Mirrors of Epiphany, the new puzzle game from creator of logic gate puzzler Pure Logic has been part of Steam Next Fest for a few days now. Based on feedback in the discussion forums, an important UI/QoL update has recently been released.
If you would like to play around with some light sources and mirrors for a few minutes, please give the demo a spin. It includes the first 10 puzzles, and has a very small download/storage footprint; only 5 MB :)
Mirrors of Epiphany store page
PS: Pure Logic is on a nice 50 % discount until the end of Next Fest ;)