A game where you play a spider in a variety of environments (forest, city park, front porch, basement, etc) where you control each leg with a different keyboard key, maybe spacebar to jump, hold a back leg to access your web, etc. you have limited energy to move/create web, and you need to build webs and traps to catch bugs.
Yes! We need more non-human/humanoid based games. I think your idea has a lot of potential tbh, playing as a jumping spider could be fun. Personally I would really like to play an orca/dolphin simulator.