Decent game
I must say your game has very good graphics and sounds.
However, as said before the controls act a bit weird sometimes.
I better get bad and good stuff apart, so:
+The game was beatable, very hard at the end tough.
+Sounds/music
+fluid graphics
-some of the obstacles are not clear to see, or better said you barely can make out where your char stops, like said before, you can get stuck at the far edge of a crystal -> which leads to annoying deaths. it's even worse when you need to speed around a corner.
-last boss battle: it was hell. really...hell. i got it because i tried like 50+ times and just got through the quicktimeevents by knowing what i need to do.
The time to react was ridiculously short.
-stones n' eyes: on the last level before the endboss you need to place some stones in front of the eyes. however the horizontal placing was a bit tricky because you barely can see where to place the stone. it was like the graphics were 2D.
All in all a quite good game. you got good ideas with the planet, the plot etc.
I'll give out 7 stars how about that.