The art style is simple but beautiful. You were able to cram quite a lot of character and detail into the 1-bit aesthetic within the constraints of the theme, bravo. The the application of the theme is great, the light and dark mechanics are combined to create a very satisfying puzzle experience.
As for complaints, some of the level design could be simplified a little, or at least given better visual indicators. I got stuck on this level as I wasn't sure what to do. The previous levels had the wires sticking out on the ground to give you a hint on what each switch does. This has no wires, and has a LOT of switches. Makes it very difficult to sift through the possible combinations and figure out what each combination does.
Despite that, it is still a very impressive entry and that achieves a lot within the limitations of the theme.
