This was an interesting one! The thing I like the most was definetly the writting. Hearing about flatland having rules and trying to spot me in the maze was defintly weird and what made me keep on pushing trough the phases, it was just as nonsencial as a little poetic and I loved that.
I'm afraid I found some problems with the mechanics but since some comments seam to have already pointed it out I'll criticise another thing, visuals. The fact that this game was solo deved is amazing and for the ammount of content it has I can see why the visuals probably got put aside, but I belive that fighting for an aesthetic here could really up the experience. It doesn't have to be anything crazy, but if the visuals could also speak about the world they are on this would be peak! Is flatland a drawing? Or an abstract colorfull plane of existence? Or maybe they could just use some effects to get the game more juicy without going for a specific theme
(Obs: If visuals are not your thing, or you can't seam to find time for them try finding a partner! It's definetly a challenge to work with other people but I'm shure it's a nice alternative)