Fun game! Nice visual style, and the controls are really responsive and crisp. The gravity concept isn't original but it's done pretty well. Someone else mentioned it too, but one of the things that bugged me was the heavy blocks. I thought it was really counter intuitive because that's not how gravity works, heavy things fall at the same rate as lighter things, so it took a while to get used to it, and even then it was kinda frustrating. Another niggly thing is with the level design, some of the levels just have identical challenges back to back. It just seems more unfair than challenging, because the player already did it once. But I'm just nitpicking, it's a simple game executed pretty well. Good job! :D

Neat game. Clever idea, and some good design. But the controls are really frustrating. The character accelerates too slowly, and there's not nearly enough friction when he stops. The collision detection is kind of janky too, simple stuff like getting stuck in walls and landing on platforms. Needs to be tidied up. Other than that it's pretty good!