eelBay is a fun little puzzle game about moving blocks of eels around, but they stick together and change shapes. It's pretty simple, but also pretty novel. (And I LOVE simple and novel puzzles, as anyone who watched me succumb to Picross Hyperfixation in 2021 can attest)
I don't usually make game recommendations... but maybe I should start? There's so many cool games out there, and so little time to discover them all!