fix: correct axis direction, air accel, and jump/dash input handling

debug/test_level_builder.gd

@@ -40,7 +40,7 @@ func _build_input_map() -> void:
 		"jump": [KEY_SPACE],
 		"sprint": [KEY_SHIFT],
 		"crouch": [KEY_CTRL],
-		"dash": [KEY_SHIFT],
+		"dash": [KEY_LEFT_SHIFT],
 		"fire": [MOUSE_BUTTON_RIGHT, KEY_F],
 		"fire_alt": [MOUSE_BUTTON_LEFT],
 		"reload": [KEY_R],
@@ -94,7 +94,7 @@ func _build_lighting() -> void:
 func _build_player() -> void:
 	var player := CharacterBody3D.new()
 	player.name = "Player"
-	player.position = Vector3(0, 1.4, 8)
+	player.position = Vector3(0, 1.7, 8)
 	add_child(player)
 	var shape := CollisionShape3D.new()
 	shape.shape = CapsuleShape3D.new()