I loved the art style and sound in this one! It's a really cool premise and I think with some more polish it can be fantastic. A few notes:
- The screen constantly zooming in and out and panning left to right was disorienting. There were so many pinpoint precision jumps to make and when the camera is constantly changing positions, it feels like it's working against me.
-The level design and speed of the character felt at odds with what makes Metroidvania games work. I think that if the goal was to make a super difficult platformer game like Super Meat Boy, this game would fill that genre well. In a Metroidvania, the player should feel incentivized to explore and the gameplay wasn't quite conducive to that.
- The sneak form was difficult to use. It was sometimes hard to keep track of where I was on the screen, especially in open rooms where the camera goes wide. The jumping wouldn't work until I pushed the attack button first, and I always had to press the transform button twice before being able to revert back to the girl form. There's also some wonkiness happening with the speed. I fly along when I'm on flat terrain, but when the ground slopes downward I grind to a halt.
All that being said, the premise is intriguing and you've got a great structure here! The jumping feels great and I felt accomplished when I got the hang of the double jumping and wall jumping. I also LOVED the third piece of music that plays when you get out of the underground area. Great job!