I quite like the graphics. They need a little polish, but I like the style. Try and make all the graphics 'feel' the same. Sometimes they feel a little mismatched.
The controls are smooth, and the character doesn't get stuck against things, but the movement is a little too fast. It can be a bit difficult to control, particularly when trying to land between spikes.
Speed up screen transitions, and the starting countdown.
It seems like you've got the start of something fun. Would like to see more levels.