A pretty good mechanic and interesting exploration of this jam's theme, very creative! In the main menu, being able to click the options in the sub-menus but only allowing keyboard navigation for the first menu seems a bit weird. Also, when I went into the level selection menu and clicked "Level 4", it took me to level 1.
Like someone else mentioned, I also got stuck in the level with the blue squares. Maybe I need to walk crab-like in this level. Some sort of incentive to continue here would be good. For example, if we could see where the end of the level is.
Visuals and audio are a bit dry but remind me of old Macintosh games I used to play.
Overall, a pretty solid game.