The moment I saw the art for this game, I knew I would adore it. And I was right! From the gentle music of the main menu to the stylistic visuals of the character sprites and their movements, this was a very polished and charming little experience. And I can't stress enough how great the character looks!
The character movement is fun and fluid, although I will say I found the wall jump to be a bit tricky to do between walls. It just stopped sometimes. I eventually got it though. Also, the bottom right most corner where you need to wall jump, you can get stuck on an invisible wall.
Regarding the gameplay as a whole, I thought the idea of having the soul form given all the different platforming abilities was creative! And limiting it to a resource seemed like a good way to prevent sequence breaking by using the powers when you were not supposed to. I do think that the audio cue for when you were about to transform back was a nice touch, although it could sometimes be missed.
Overall, this is a game I really hope you continue work on, and I look forward to seeing where it goes!