mope.io

Mope.io is a browser game based on nature and evolution. You start off as a low tier animal such as a mouse, shrimp, chipmunk, or kangaroo rat. Your purpose in this sandbox-esque game is to eat food to gain XP. The more XP you get, the higher you appear on the leaderboard and the more animal choices you can evolve to! When playing, you need to survive against predators and chase down prey all while maintaining your energy.