Neat idea, execution could use some work. The platforming physics and collisions are a bit jank, but that stuff is pretty hard to get right. It's also a bit unclear how things work at the beginning, a little more could be done to demonstrate to the player how the mechanic works. The sign pointing to the pile of blocks is a good step toward that but it needs a little more. Anyway I think the idea is cool and has potential, don't want to be discouraging or anything. Keep at it and you can make it better!