Nice job! Moving around as a spring is a fun, novel game mechanic, & the art & music are both nice! The platforming can feel a little annoying at times, which I think could be helped by just giving the spring a longer hang time in the air akin to Super Mario Galaxy.
At the point where I was supposed to do a "small jump," I couldn't figure out how, because no matter how quickly I pressed jump, the spring still did a large jump. Overall, fun little game!