Start the game! Just adds a basic player character with rough movement

.gitattributes

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+# Normalize EOL for all files that Git considers text files.
+* text=auto eol=lf

.gitignore

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+# Godot 4+ specific ignores
+.godot/

Sprites/hockey_player.png.import

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+[remap]
+
+importer="texture"
+type="CompressedTexture2D"
+uid="uid://bknjh6k2ocrri"
+path="res://.godot/imported/hockey_player.png-2943b0999ca2f3e81e7d84176d3012c9.ctex"
+metadata={
+"vram_texture": false
+}
+
+[deps]
+
+source_file="res://Sprites/hockey_player.png"
+dest_files=["res://.godot/imported/hockey_player.png-2943b0999ca2f3e81e7d84176d3012c9.ctex"]
+
+[params]
+
+compress/mode=0
+compress/high_quality=false
+compress/lossy_quality=0.7
+compress/hdr_compression=1
+compress/normal_map=0
+compress/channel_pack=0
+mipmaps/generate=false
+mipmaps/limit=-1
+roughness/mode=0
+roughness/src_normal=""
+process/fix_alpha_border=true
+process/premult_alpha=false
+process/normal_map_invert_y=false
+process/hdr_as_srgb=false
+process/hdr_clamp_exposure=false
+process/size_limit=0
+detect_3d/compress_to=1

game.gd

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+extends Node2D
+
+
+# Called when the node enters the scene tree for the first time.
+func _ready():
+	$PlayerController.set_player_node($Player)

game.tscn

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+[gd_scene load_steps=4 format=3 uid="uid://d2skh3wa6s2j7"]
+
+[ext_resource type="PackedScene" uid="uid://b3llhcsie7y4u" path="res://player.tscn" id="1_2ej6p"]
+[ext_resource type="Script" path="res://game.gd" id="1_swmdi"]
+[ext_resource type="PackedScene" uid="uid://clntxmhd5uhlt" path="res://player_controller.tscn" id="3_v82a6"]
+
+[node name="Game" type="Node2D"]
+script = ExtResource("1_swmdi")
+
+[node name="Player" parent="." instance=ExtResource("1_2ej6p")]
+
+[node name="PlayerController" parent="." instance=ExtResource("3_v82a6")]

icon.svg

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+<svg height="128" width="128" xmlns="http://www.w3.org/2000/svg"><rect x="2" y="2" width="124" height="124" rx="14" fill="#363d52" stroke="#212532" stroke-width="4"/><g transform="scale(.101) translate(122 122)"><g fill="#fff"><path d="M105 673v33q407 354 814 0v-33z"/><path fill="#478cbf" d="m105 673 152 14q12 1 15 14l4 67 132 10 8-61q2-11 15-15h162q13 4 15 15l8 61 132-10 4-67q3-13 15-14l152-14V427q30-39 56-81-35-59-83-108-43 20-82 47-40-37-88-64 7-51 8-102-59-28-123-42-26 43-46 89-49-7-98 0-20-46-46-89-64 14-123 42 1 51 8 102-48 27-88 64-39-27-82-47-48 49-83 108 26 42 56 81zm0 33v39c0 276 813 276 813 0v-39l-134 12-5 69q-2 10-14 13l-162 11q-12 0-16-11l-10-65H447l-10 65q-4 11-16 11l-162-11q-12-3-14-13l-5-69z"/><path d="M483 600c3 34 55 34 58 0v-86c-3-34-55-34-58 0z"/><circle cx="725" cy="526" r="90"/><circle cx="299" cy="526" r="90"/></g><g fill="#414042"><circle cx="307" cy="532" r="60"/><circle cx="717" cy="532" r="60"/></g></g></svg>

icon.svg.import

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+[remap]
+
+importer="texture"
+type="CompressedTexture2D"
+uid="uid://bg5wwos0fgs03"
+path="res://.godot/imported/icon.svg-218a8f2b3041327d8a5756f3a245f83b.ctex"
+metadata={
+"vram_texture": false
+}
+
+[deps]
+
+source_file="res://icon.svg"
+dest_files=["res://.godot/imported/icon.svg-218a8f2b3041327d8a5756f3a245f83b.ctex"]
+
+[params]
+
+compress/mode=0
+compress/high_quality=false
+compress/lossy_quality=0.7
+compress/hdr_compression=1
+compress/normal_map=0
+compress/channel_pack=0
+mipmaps/generate=false
+mipmaps/limit=-1
+roughness/mode=0
+roughness/src_normal=""
+process/fix_alpha_border=true
+process/premult_alpha=false
+process/normal_map_invert_y=false
+process/hdr_as_srgb=false
+process/hdr_clamp_exposure=false
+process/size_limit=0
+detect_3d/compress_to=1
+svg/scale=1.0
+editor/scale_with_editor_scale=false
+editor/convert_colors_with_editor_theme=false

player.gd

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+extends Area2D
+
+
+
+# Maximum radial turning speed of the player
+@export var turning_speed = PI/4 # (rad/sec)
+# Maximum speed added to player's velocity per push
+@export var skate_speed = 100 # (pixels/sec)
+# Maximum speed deceleration while stopping
+@export var braking_speed = 200 # (pixels/sec^2)
+# "Natural" deceleration
+@export var decel_ratio = 0.15 # (decel applied per second)
+
+var velocity: Vector2
+
+func _ready():
+	velocity = Vector2.ZERO
+	
+
+func _physics_process(delta: float):
+	# Flip sprite
+	if velocity.length() > 0:
+		$AnimatedSprite2D.flip_h = velocity.x > 0
+	
+	# Update position
+	position = clamp_position(position + (velocity * delta))
+	
+	# Decelerate naturally
+	# TODO fix vector math, need to apply to hypotenuse, not the sides
+	# TODO fix decel math, think compounding interest, it doesn't work this way
+	# TODO brake harder when almost stopped
+	velocity = velocity * (1 - decel_ratio * delta)
+
+
+func push(effort: float, angle: float):
+	var delta_v = effort * skate_speed
+	velocity += delta_v * Vector2.from_angle(angle)
+
+
+# TODO how to do doc comments?
+# TODO should applying delta come from the controller or the player? It doesn't
+# matter too much because these objects are pretty tightly coupled anyways.
+func turn(effort: float, delta: float):
+	# Continuosly call with the effort while turning
+
+	# effort is +ve right, -ve left? maybe, some orientation
+	velocity = velocity.rotated(effort * turning_speed * delta)
+
+
+func brake(effort: float, delta: float):
+	var delta_v = effort * braking_speed * delta
+	delta_v = min(delta_v, velocity.length())
+	velocity -= delta_v * velocity.normalized()
+
+
+# TODO setup collision from world, and edges of arena, not the window
+func clamp_position(new_pos: Vector2) -> Vector2:
+	var size = Vector2(get_window().size)
+	if new_pos.x > size.x:
+		if velocity.x > 0:
+			velocity.x = 0
+		new_pos.x = size.x
+	if new_pos.x < 0:
+		if velocity.x < 0:
+			velocity.x = 0
+			
+		new_pos.x = 0
+		
+	if new_pos.y > size.y:
+		if velocity.y > 0:
+			velocity.y = 0
+		new_pos.y = size.y
+	if new_pos.y < 0:
+		if velocity.y < 0:
+			velocity.y = 0
+		new_pos.y = 0
+	
+	return new_pos

player.tscn

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+[gd_scene load_steps=5 format=3 uid="uid://b3llhcsie7y4u"]
+
+[ext_resource type="Texture2D" uid="uid://bknjh6k2ocrri" path="res://Sprites/hockey_player.png" id="1_dtrap"]
+[ext_resource type="Script" path="res://player.gd" id="1_gh3p0"]
+
+[sub_resource type="SpriteFrames" id="SpriteFrames_oslmh"]
+animations = [{
+"frames": [{
+"duration": 1.0,
+"texture": ExtResource("1_dtrap")
+}],
+"loop": true,
+"name": &"default",
+"speed": 5.0
+}]
+
+[sub_resource type="RectangleShape2D" id="RectangleShape2D_exun0"]
+size = Vector2(42, 108)
+
+[node name="Player" type="Area2D"]
+process_physics_priority = 1
+script = ExtResource("1_gh3p0")
+metadata/_edit_group_ = true
+
+[node name="AnimatedSprite2D" type="AnimatedSprite2D" parent="."]
+sprite_frames = SubResource("SpriteFrames_oslmh")
+
+[node name="CollisionShape2D" type="CollisionShape2D" parent="."]
+position = Vector2(-7, -6)
+shape = SubResource("RectangleShape2D_exun0")

player_controller.gd

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+extends Node
+
+# Variables used by controller
+@export var skate_push_start_len = 0.2
+@export var skate_push_end_len = 0.9
+@export var skate_min_time = 0.02
+@export var skate_max_time = 0.1
+@export var skate_max_turn_radius = PI / 8
+@export var brake_deadzone = 0.3
+
+var skate_occurred: bool
+var time_for_push: float
+
+var player_node: Node = null
+
+# Called when the node enters the scene tree for the first time.
+func _ready():
+	skate_occurred = false
+	time_for_push = 0
+
+
+# Called every physics processing step
+func _physics_process(delta):
+	if player_node == null:
+		# Don't call the processing functions if the player node isn't set
+		return
+
+	var joy = Input.get_vector("move_left", "move_right", "move_up", "move_down", 0)
+	handle_skate_push(joy, delta)
+	handle_turning(joy, delta)
+	handle_braking(joy, delta)
+
+
+func set_player_node(node: Node):
+	player_node = node
+
+
+func handle_skate_push(joy: Vector2, delta: float):
+	var pos = joy.length()
+	if pos >= skate_push_start_len and !skate_occurred:
+		time_for_push += delta
+		
+		if pos >= skate_push_end_len and !skate_occurred:
+			if time_for_push >= skate_min_time and time_for_push <= skate_max_time:
+				var effort = 1 - time_for_push / skate_max_time
+				player_node.push(effort, joy.angle())
+				
+			skate_occurred = true
+			
+	elif pos < skate_push_start_len:
+		skate_occurred = false
+		time_for_push = 0
+
+
+func handle_turning(joy: Vector2, delta: float):
+	if joy.length() < 0.95:
+		# Only turn if the stick is at the edge
+		return
+
+	# TODO this doesn't work well when you hit a wall
+	var radial_diff = player_node.velocity.angle_to(joy)
+	if (radial_diff >= PI/3):
+		# Only turn for roughlyone "half" of the stick. The other half is used for braking
+		return
+		
+	var is_negative: bool = radial_diff < 0
+	var turn_effort = min(abs(radial_diff), skate_max_turn_radius) / skate_max_turn_radius
+	if is_negative:
+		turn_effort = -turn_effort
+
+	player_node.turn(turn_effort, delta)
+
+
+func handle_braking(joy: Vector2, delta: float):
+	if joy.length() < brake_deadzone:
+		# Only brake past a certain amount
+		return
+		
+	var radial_diff = player_node.velocity.angle_to(joy)
+	if (radial_diff < 3 * PI / 4):
+		# Only brake if controller is mostly facing away from velocity
+		return
+		
+	player_node.brake(joy.length(), delta)
+

player_controller.tscn

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+[gd_scene load_steps=2 format=3 uid="uid://clntxmhd5uhlt"]
+
+[ext_resource type="Script" path="res://player_controller.gd" id="1_fj1gd"]
+
+[node name="PlayerController" type="Node"]
+script = ExtResource("1_fj1gd")

project.godot

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+; Engine configuration file.
+; It's best edited using the editor UI and not directly,
+; since the parameters that go here are not all obvious.
+;
+; Format:
+;   [section] ; section goes between []
+;   param=value ; assign values to parameters
+
+config_version=5
+
+[application]
+
+config/name="Offside"
+run/main_scene="res://game.tscn"
+config/features=PackedStringArray("4.1", "Forward Plus")
+config/icon="res://icon.svg"
+
+[input]
+
+move_left={
+"deadzone": 0.5,
+"events": [Object(InputEventJoypadMotion,"resource_local_to_scene":false,"resource_name":"","device":-1,"axis":0,"axis_value":-1.0,"script":null)
+]
+}
+move_right={
+"deadzone": 0.5,
+"events": [Object(InputEventJoypadMotion,"resource_local_to_scene":false,"resource_name":"","device":-1,"axis":0,"axis_value":1.0,"script":null)
+]
+}
+move_up={
+"deadzone": 0.5,
+"events": [Object(InputEventJoypadMotion,"resource_local_to_scene":false,"resource_name":"","device":-1,"axis":1,"axis_value":-1.0,"script":null)
+]
+}
+move_down={
+"deadzone": 0.5,
+"events": [Object(InputEventJoypadMotion,"resource_local_to_scene":false,"resource_name":"","device":-1,"axis":1,"axis_value":1.0,"script":null)
+]
+}