In 50 blocks, I made an engine that makes pop up ads in your game. I know most users won't want to add this in their games, but I just thought it would be cool to make. You could use it to advertise your upcoming games. Ads appear every 15 to 20 seconds. These numbers can easily be modified in the code!
Some of the advertisements I made leak some of my upcoming games. Upcoming Games: Space OS 3: 4/25/22 Untitled Platformer: 5/13/22