It's pretty good. I love shapeshifting, it's like axiom verge's corruptor but with a sense of humor. I like the consistency of entities bouncing from each other, and it even works on the boss. Shortcut unlocking is cool, especially when it's over the top.
I feel like it needs some combat encounters to get player up to speed before the boss fight difficulty spike, especially since it's better to simply run past enemies whenever you can.
After losing to the bouncer boss it persists some data, and you retry the fight with the harder pattern from the start.