The controls might as well have buttons, since right now it's just buttons but they are invisible. Why can we collide with some bricks in the background, but not others? At least give them a different colour or some sort of ondication that you can run into them.

I'm not a big fan of the controls. I think you should make left side roll left, right side roll right. Then above the right "button" be jump.

In the second level, I was really confused on why all of a sudden some of the bricks in the background are collidable. Nothing "hints" at being the case, no art change nothing. Just all of a sudden I bump into it and die.

The player "ball" needs some graphic. Looks like a black void just sliding around right now.

Physics are eh. Moving forward and jumping together is the conflict, not the game itself. Collision and invisible fields need to be adjusted as well. Graphics are cool.

Definitely not a bad game, in fact above average, though the controls could be simpler.