Nice platformer. Idea and gameplay are simple and that's good and bad thing. Good thing is that you can just jump right in and play, no need to learn difficult mechanics. Bad thing about that is that I did not find the game so interesting after playing it a while. So in my opinion game is maybe too simple. (But I think that's what you tried to do: casual, simple game).
Game art is enjoyable and makes me happy! Gameplay is also pretty good. Only thing that bothers me is that hitboxes are sometimes too big: you can die pretty far away from spikes and enemies.
Keep it going!