Go to this site to get a version of minecraft that is free: eaglercraft.com/play/?version=1.8.8-wasm (some more recent minecraft updates may not be available on this version of free minecraft.)
If you don't want any of those and want a good 1st person shooter try www.poxel.io it will redirect you to the site and you can play instantly.
Here is a snake game: https://playsnake.org/
Here is super mario: mario.uma.im/