The little sprites are nicely done, and it's cool changing forms back and forth to accomplish goals! A very fun game concept! I hope to finish it off once the bug with the crow is fixed.
I can't help but wonder if there's a better way to ensure that there's space for the wisp to transform. It's a bit bothersome when it looks like I have plenty of space to become the bear, but I'm just a bit too close to the rock for the option to appear. I'm guessing it's to avoid clipping, but perhaps the bear could be shifted away if it's too close? It's a programming challenge for sure.
Overall, a nicely put together game!
If you have the chance, please consider checking out my own game. I'm looking for more feedback.