Very beautiful visuals, and great music, but there were a couple of things that bothered me right away. The first was that the cool music in the intro immediately goes away when you enter the first level, and with it, so did my energy. It was like being hyped up, then told to calm down. The second, much bigger issue I had was all the in-game tutorial text. Actual walls of text explaining the game, but the game didn't even seem that complex yet. Just movement, E to interact, R to warp, and collecting crystals and getting to the end point. I really wanted to get straight into playing the game, but I actually felt like the tutorial text was barring me from that rather than enabling me. A big golden rule of games is to keep to only a couple of sentences or keep them brief in some other way.
Honestly, most of my bellyaching is because I was really interested in playing the game, but the tutorial felt like a slog to get through and I wasn't able to infer what I was supposed to do other than collect crystals and go through portals.
Still, a very interesting entry and I think it would thrive more with less training wheels attached! Great job! (I tried to not let my sort of lazy reading tendencies hurt your score. When I notice I'm being fairly biased I try to bump up the stars a bit to compensate for my personal preferences.) ^ ^;