I got the hard badge! :D
You definitely need to either change the speed of the hearts or get a different life system. There are also a lot of unavoidable deaths on account of the laser and green bombs being faster than you (as well as the hearts, which is unfortunate). It is a decent game, challenging and whatnot.
It's kind of fun, but it's kind of cheap that he's faster than you with the windmill thing, he chases you into the edge alot and u cant get away. Also, the laser attack should only hit once, because it kills u in one hit when it gets u 3 times in a row
2/5