Great idea and use of the theme. The level transitions are tricky though: for example, at the end of level 1, my beam touched the target but did not extend enough into the 2nd level that I could have a chance to win. Fortunately the last mirror was still selected even though it was off screen, so I managed to fix this. But I inadvertently led a mirror of the 2nd level off screen and there was no way for me to recover it once I selected another one. If this was addressed the game would be an amazing experience.
Nice work on the audio, adds to the atmosphere.