Joy of 20 Million! is the first and only stage in the event chapter "20 Million Downloads Special Gift!"
Doge and Firework Guys appear as peons.
Birthday Cake appears as a boss.
Overall, this stage can be easily completed with Cow Cat.
- Use fast cats such Crazed Cow or Cow Cat to easily rush the stage, as the Cake enemy is metal and you want to maximize your hits per second as much as possible.
- The birthday cake will do virtually no damage so you do not need to spawn meat shields.