It was hard to tell what to do. The text for the controls stayed up the entire time and gave no indication of what the mechanics or goals were. Then I just won upon finding the spot where the colliders didn't make sense. I think the idea is really nice, but the execution could've used just a bit more to get it right. It also is not good design to trap the player on the ending screen with no way to leave. As a general rule, if your player has to use Alt-F4, there's something wrong.