Version 1.2 update - Optia remembers where your mirrors are!
You’ve carefully placed your mirrors, and you’re just setting down the last one. You fire the laser, but then notice that the last mirror is one notch off - so the beam reflects all the way back and blows up your laser, and you’ve got to replace all your mirrors after the level restarts. Well, no more! Optia now remembers how your mirrors were set up, so when the level resets, all you have to do is fix the problem and try again!
You may have also run into this when firing single-shot lasers - now that you don’t have to reset everything up again, feel free to test-fire the laser more.