Play Clicker Monsters in FULL SCREEN
Furiously click on each monster, purchase upgrades for your weapon and then sit and idle while you slowly go through each monster. Unlock new lands and beat each boss in this never ending idle game.
Interesting bug, money that is bouncing around hasn't got an assigned value, it's based on the currently out monster. Move to earlier levels, have loads of coins out, head through the higher levels as fast as you can, get loads of cash money