Woah
The game was fun. A simple design idea and sometimes very challenging maps. I would definately say keep up the work!
Somethings that need to be worked on:
1) Spacing of the 'mines.' Some cases you could just skip entire sections of the level if not the entirety of the level if the mines were at the right angle.
2) Catching the ball. I'd draw a sharp loop, the ball would fall, hit it and keep on going.
I am just going to say this:
Keep making challenging ideas and screw the people who cry because it's too hard. The boss made me laugh and made me think for just a bit. Some of the levels had me completely stumped, "HOW THE FUCK?" comes to mind. Keep doing that. If they were all easy I wouldn't have decided it was worth it to finish the game.
Good job.