These's like a tons of upgrade and classes for you to choose ranged from a high-damage sniper rifle to a real life double cannon, players is also be able to choose special upgrade every one level. Like regeneration, damage, speed, firerate,... Controls / Keys: [Arrow keys] or [WASD] to move [E] toggles guns on and off, [Mouse] to aim [1-8] to upgrade stats [M] + [1-8] to set auto stat upgrade (just [M] to turn off) (all credit for the original game of diep.io, go and visit the game website here: https://diep.io/)