Haha, it looks like multiple people have been having the same idea. Last year I actually made a game for the Playdate handheld that used the same concept, simply called Ouroboros (gameplay video here, in case you want to check it out without going to the trouble of installing a Playdate simulator). Don't let that discourage you from continuing with this, though. There are many different ways to explore this concept, and I'm looking forward to see which way you'll take it. We may just be starting a new puzzle game genre here😅