The game isn't finished yet, but I can see the idea behind it. Finding the crystals hidden in the shadows was a cool mechanic, and when the music played, it added a really mysterious vibe to the game (though I had to go into the options and back for it to activate).
The controls felt a bit too fast, making it easy to fall, and the character always turning to the right was sometimes frustrating, especially when trying to line up a dash to the left. The player's health also seemed quite high, making the game not very punishing, even if you stay in hazards or walk into enemies.
The game felt a bit short, and at times, it was hard to tell where to go especially since there were no signs indicating room transitions.