many small changes, and few big ones

core/player/player.gd

@@ -0,0 +1,54 @@
+extends CharacterBody2D
+
+@onready var camera = $Camera2D
+
+# die
+
+func die():
+	LevelsCore.load_entrypoint(Gamestate.last_entrypoint)
+
+# movement and stuff
+
+@export var movement_speed = 300.0
+@export var jump_velocity = -350.0
+@export var air_friction = 0.02
+@export var floor_friction = 0.1
+@export var max_jumps: int = 2
+@export var rigidbody_impulse_mult: float = 0.04
+
+var locked: bool = false
+var jumps: int = 0
+
+func _physics_process(delta: float) -> void:
+	var gravity = get_gravity()
+	var dir = Input.get_axis("player_left", "player_right")
+	var on_floor = is_on_floor()
+	var on_wall = is_on_wall()
+	# left right movement
+	if dir and not locked:
+		velocity.x = move_toward(velocity.x, dir * movement_speed, movement_speed*floor_friction)
+	elif on_floor:# or on_ceiling:
+		velocity.x = move_toward(velocity.x, 0, movement_speed*floor_friction)
+	elif not locked:
+		velocity.x = move_toward(velocity.x, 0, movement_speed*air_friction)
+	# gravity
+	if not on_floor:
+		velocity += gravity * delta
+	# reset number of jumps
+	if on_floor or on_wall:
+		jumps = 0
+	# jumping / dropping from ceiling
+	if Input.is_action_just_pressed("player_jump") and not locked:
+		if jumps < max_jumps: # (allows air jumps)
+			velocity.y = jump_velocity
+			jumps += 1
+	move_and_slide()
+	# affect rigid bodies
+	# adapted solution from
+	# https://kidscancode.org/godot_recipes/4.x/physics/character_vs_rigid/index.html
+	for i in get_slide_collision_count():
+		var collision = get_slide_collision(i)
+		var collider = collision.get_collider()
+		if collider is RigidBody2D:
+			var impulse = -collision.get_normal() * (velocity.length() / collider.mass) * rigidbody_impulse_mult
+			collider.apply_central_impulse(impulse)

core/player/player.tscn

@@ -0,0 +1,34 @@
+[gd_scene load_steps=4 format=3 uid="uid://ebb4pfxklatj"]
+
+[ext_resource type="Script" path="res://core/player/player.gd" id="1_fob34"]
+
+[sub_resource type="RectangleShape2D" id="RectangleShape2D_7cq61"]
+size = Vector2(16, 16)
+
+[sub_resource type="OccluderPolygon2D" id="OccluderPolygon2D_p33ik"]
+polygon = PackedVector2Array(-8.605, -17, -9, 1, 9, 1, 8.385, -17)
+
+[node name="Player" type="CharacterBody2D"]
+collision_layer = 2
+slide_on_ceiling = false
+floor_block_on_wall = false
+script = ExtResource("1_fob34")
+
+[node name="CollisionShape2D" type="CollisionShape2D" parent="."]
+position = Vector2(0, -8)
+shape = SubResource("RectangleShape2D_7cq61")
+
+[node name="LightOccluder2D" type="LightOccluder2D" parent="."]
+occluder = SubResource("OccluderPolygon2D_p33ik")
+
+[node name="Polygon2D" type="Polygon2D" parent="."]
+polygon = PackedVector2Array(-8.605, -17, -9, 1, 9, 1, 8.385, -17)
+
+[node name="Camera2D" type="Camera2D" parent="."]
+process_callback = 0
+position_smoothing_enabled = true
+drag_horizontal_enabled = true
+drag_vertical_enabled = true
+drag_top_margin = 0.3
+drag_bottom_margin = 0.3
+editor_draw_drag_margin = true