I think that this is something that, with a bit of polishing, can turn into a really fun game. I had a problem with not knowing where to go after the first checkpoint, and i think that having the sound affect that plays when swinging the axe only be played when the player successfully hits a tree would help a lot with communication, plus some fiddling with the size and speed of the cactus pricks would make it feel more thorough. All in all, throughout development you should include more playtesting, but it has great potential, basics of gameplay, and gameloop.