This is a pretty cool game. But why is the tutorial at the end of a level, not at the beginning? When a player finished a level, they already understand the game mechanic.
Also the clear gems reflecting the beam seems to take different paths depending on where it can go to. This makes it a bit unintuitive imho. It would be better if this mechanic was a bit simpler, i.e. the beam always bends at 45degrees for a clear gem, always straight forward for a red gem.
1: it's not a "tutorial" it's a review. Not everyone will understand the mechanic and instead they just fumbled through the level, so it's there so that everyone is on the same page after a level. If the review were at the start of a level, it would spoil the discovery part of the puzzle. That's the best part! It's like spoiling the climax of a movie!
2: You seem to fundamentally misunderstand how the mirror gem works. Were you actually reading the "tutorials" you were complaining about? That's besides the point. The fact that the mirror block doesn't work "intuitively" is the exact point. This is a puzzle game, not a shooter. You're supposed to be solving the puzzles using information, not intuition. And besides, if it worked exactly how you expected, you wouldn't have that thrill of discovery that puzzle games are designed for.
TL;DR: bad opinion
