This was based on Diep.io, but it takes a very different approach. Movement WASD - Arrow Keys. Actions Click to shoot. Click to upgrade. The goal of the game is to beat every wave as fast as possible. You can advertise if you really must.
Pixabay music and sound effects. Pigstep from Minecraft. 100% code by me. 3001 blocks of code... (idk how that happened)