Interesting puzzle but the controls are not quite intuitive... The way the moment you click on a mirror it snaps on your mouse for moving or rotating makes fine tuning the mirrors more tedious than it already is. Additionally the game lacks any concrete logic for its star system - Normally puzzle games with a star system lock them behind some hard restriction, like score vs birds used in Angry Birds. But for Derrorim, you have no restrictions, you can use as many mirrors as you want, fire as many shots as you need. Since these are unlimited in use AND the basis for score, there is no reason for the player to just find the right solution, restart the level, and get the three stars by not changing anything in their strategy or procedure other than doing what they did just now, again... Whichs begs the question: Why does the score look at the start of the level to the end, rather than
As a side note, the prims are a neat mechanic but I feel they outclass mirrors to the point you have no reason to use them once they get introduced, besides the potential risk of crashing the game.