Thanks for the demo, I really enjoyed the game, and will definitely get the full version.
Some things that came to mind:
- Some tutorials only apply to the gamepad, so a keyboard user must guess what "A" or "Y" translate to.
- It would be nice to tie the backstory to the gameplay (switching characters with "holy" and "evil" mode hinted from the opening scene).
- There should be checkpoints inside the levels: it's not fun to solve one mini-puzzle, die on the other one, and have to repeat the entire level. Level 4 of part 2 was not particularly fun because of this.
- Take this with a grain of salt: the later puzzles rely more on pressing a button at the right time than coming up with a clever solutions. In general it's more satisfying to have to come up with a mentally challenging solution than having to replay a mini-puzzle a few times until you jump or shoot at the right instant.
I made a video of my playthrough: https://www.youtube.com/watch?v=o8S1tI9_vAA