Add animation, Box Trap for Area2D

.godot/editor/filesystem_update4

@@ -2,3 +2,5 @@ res://scenes/game.tscn
 res://scenes/character.tscn
 res://scenes/bullet.tscn
 res://scenes/crate.tscn
+res://scenes/platform.tscn
+res://scripts/gamecontroller.gd