I had fun playing your game. I like shrinking platforms and limitations, not sure if you know but the block you push doesn't always land where it should, it is cool though and fits perfectly with the style of your game. I have no idea what that button does at the end of the game, it seems like it should create a platform. I got to the end somehow. Maybe you could have some platforms which can fall and squash the boss or have to land on his platforms so they disappear.