Fantastic job making it just confusing enough that I kept almost quitting, but then would realize the answer and keep playing. I didn't realize how to interact with a core element of the game. Didn't realize that a certain element would kill me. I had to work around there not being a reset button (which made me feel clever). Another time I almost quit was when there didn't seem to be away to get around the box. At first the music felt off to me because the beats are spread out an unexpected amount at one point, but I got used to it.
After finishing, it doesn't make sense to me that the green square with spikes down can be walked over without green glasses on.