The idea of getting something special after killing yourself is not new, but at this point, it is kind of hard to come up with something that has not been made already.
The level design was superb, which made me keep trying to find a solution to each level and some of them were actually quite interesting. I liked the fact that most of the sounds seemed to be done by just making noises on a microphone, which gave the game a nice feeling which I tend to associate with a game made because you liked to make it.
I only got a couple of 'complains' about the game, first, the lack of a decent background music (I could hear something, but I am not quite sure if it was some low tune or it was just the 'cave wind'. Second thing is something that I actually look forward in any game, a good story. You start by waking up on the cave and you try to get out, which is a nice start. I can see that you tried to make a plot, but for reason it didn't fully get into the game, once you get out of the cave, that's it. Nothing but a few sentences about a possible future for yourself and the credits (I wont say more to not completely spoil)
The game is a really nice way to kill some free time, but not much more than that. Once again, the level design was incredible, and the difficulty escalates quite slow, but once you get the power up, things get really interesting and it gets challenging.