Blockor.io unblocked is a great IO game that can be played online at school. You will walk around the map to hunt for a lot of shapes then try to connect them all to your character so that you can build your size. When you run into enemies, just quickly use your abilities then crash into them. If you are bigger than them, they will die, and vice versa, you will get destroyed if you're smaller. Hence, you should focus on growing your mass, play with good strategies and attempt to survive longer!
Unblocked sites: Unblocked Games 77 - Y3 Games - Unblocked Games Weebly