Amazing game! I love how new areas are unlocked whenever the player gains an ability, and solving these puzzles felt really rewarding.
Spoilers for owl ability:
I noticed that the bottom of waterfalls were still impassable with the owl ability, which feels a bug since the player can pass through everything else
Also, can I suggest allowing the player to still interact with the environment when they have the owl ability (I know that it is not intended to continue after getting the owl, but it can be fun to replay puzzles)