Really nice! This looks really polished and plays fluently. Cool! I do think it's a bit boring because of the lack of variation (in enemies and powerups), there's no incentive for breaking my pattern of circling around the mob.
But, if you intend to extend further upon this you have a really, really solid base game!
Did encounter one 'bug'. I wanted to go between the rock and tree to the right'ish, but I couldn't, so I died :-/ Maybe I didn't see an obstacle, but it really looks like a clear path.
