This was really, really well done! The concept was unique and definitely fit the limitation. As the levels became more complex, I found myself using methods maybe I wasn't intended to use? Such as simultaneously jumping and destroy the boxes, and immediately emplacing them below me. I feel like there were a lot of extra boxes I was supposed to get, but just didn't using that method. Anyways, the graphics and sounds were great, but some music would've been cool! Overall great job!