Cool idea, and I love how springy and squishy the snail feels!
My main comment/criticism would be that it's very tricky to fling the little dude when he is on the ground! Which is most of the time.
Some sound would add a lot, and maybe an intro splash screen that shows how the fling mechanic works (took me a while to figure it out). But I'm sure you would've gotten to that with a bit more time.
But the game works, I think it could be a fun score attack game with a bit more polish!