I enjoyed it(:
The game was very simple, but I really enjoyed it! Simple animation, simple concept... but I still found it fun. I had no problem with the controls. The only criticism I have is that it was a bit TOO simple. Maybe add more things that fall other than hearts, rocks and bombs? Other power-ups for example. Maybe a shield power up, or a power up that makes the next heart on the screen gravitate toward the character. Also, maybe you could make the character a little more complex? I'm a huge fan of stick figures, but I think it takes away from the game a bit.
Overall, like I said, I enjoyed it. Good job(: