This is a fun platformer, but the first level is by FAR the hardest part. I'm not sure if it's the intended route, but the only way I could find off the first platform is to fake jump to drop the item below, then I could squeeze down, get it again, and then I got stuck where the snail is in the picture... eventually I got out! Each of the next few levels took me seconds to get through, but I feel like this first one needs some tweaking. It seems like it's trying to teach the jump, but the wall in the middle seems too high.
Excellent job!