Very cute! I enjoyed the environment and character design and animations a lot. Well done.
I wish the movement could have been faster, though. I feel that at least your "sprinting" speed should have been the "normal" speed, and your actual sprint should be even faster. Especially for such a large environment!
The enemies are great at giving you a time pressure of sorts, but I think there could be some fixed hazzards too. But I get it's supposed to be a chill game, so maybe removing the enemies could even work better towards that. More variety of challenges (instead of just clouds you jump on) would be great.
I know I said your movement speed is too slow. But on the other hand, I'd also enjoy it if the mountainous areas also had stuff to do. I liked exploring them, and would prefer it if there was something to collect or do.
I think the section to the right of where you start has a bit too much waiting. The cloud you have to wait for is super slow, and since you're likely to fail that challenge, it gets a bit boring having to wait for it multiple times. Also, I couldn't access the good thought on the cloud going up from there, which I think you realize since you only need 10 out of the 11 thoughts to finish the game! That was a good decision, I think.
Overall, don't think of these as negative comments, as the game was very enjoyable. It's more along the lines of suggestions in case you want to continue this game :)
Great job!