Thanks for playing, and for your feedback! I'm glad you liked the mechanics. In the next version, I'll definitely map the End Turn button to a key, and let turns end immediately if there are no enemies which can attack anyways, so players won't have to switch between the button and the chess board any more. Sound effects (and animations) are also among the things I want to tackle for this version.
Regarding the levels: Yeah, these are definitely too static at the moment (and you are totally right about the Light Room). The main goal of this first prototype was to check if the game mechanics are interesting, and fun to play - so I did focus on those. For future versions, I will definitely spend more time on the level design...I already have some ideas which I'll add to the game. Then, players also won't have to re-do levels they have already cleared.