Very nice for a first game, a bit challenging in a good way. This could go on all sorts of directions, baddies, spikes, hazards, etc
Didn't knew you could jump in the clouds so you could make it more obvious that they are platforms somehow.
I've never played Kirby games but all the Kirby inspired games I've seen tend to be good. Keep at it, hoping to see more soon. Stay creative with the design though!