Prince.today is an io game called "free-for-all" where you can blow yourself up.
The bigger you are, the faster you move and the more particles you kick out, which makes it easier to kill other players.
You should eat enough to get big and fast but don't eat too much. If you do, it's very easy to run into an explosion and die out of the blue.
If you get too big and fast for your liking, you can just explode to go back to your original size and speed.
Have fun and good luck!