Really cute, the art style is a bit rough and ready but I think it's quite charming. I like the jumping animation and really like the terrain art style. I didn't get to the end because the character got stuck in the terrain at one point and I couldn't move, so I stopped there. But I like it! Please consider checking out my submission to the VimJam!
Yeah, its a bug with the Collisions, I've been trying to figure it out to no luck. Art isn't really my strong suit, but I feel like I gave it a good effort. Your game is really good, I especially like the dithering in the back ground and the responsiveness of the controls. Only problem I had with the web version was that when I used the arrow keys it would scroll the screen down, but that is a inherent problem with the way websites work and not the game.