the concept was reaaaaally cool and I bet you could make some great puzzles. I hope there would be more levels in the future. However, maybe you should make the bullet lose velocity faster? currently you don't really have to think about the direction you're shooting in level 1 as long as you shoot through the hole in the wall, as the bullet would ricochet off the wall enough for you to be just able to wait in the hope of it hitting the box
anyway, thanks! I had a great time playing (: