Players are tasked with defending their base from a swarm of balloons called Bloons. The objective is to pop as many of these colorful orbs as possible by using a variety of towers and upgrades to create a successful defense strategy.
The game takes place on a rectangular field where the player places towers to minimize the bloon damage reaching the end of the track. The bloons vary in color and size, and each presents a different type of challenge. Some explode after popping, while others multiply or change color. The game runs in the browser without the need for download or registration, allowing users to jump in and play right away.