A greenfoot version of osu!, Taiko no Tatsujin and Beatmania.
Since I need to use Greenfoot in my project, you need to download Greenfoot to run the game.
This project uses Java 11.0.2+9 you can find the download link here.
You will need to create a folder called libs on the project and copy greenfoot.jar (GREENFOOT_INSTALLATION_PATH/lib/extentions) and bluejcore.jar (GREENFOOT_INSTALLATION_PATH/lib) on it ( I don't include then because you need Greenfoot anyways to run the game ) and run Run task on Gradle (search any tutorial how to use Gradle or use Gradle from IntelliJ).
https://lerks.blog/making-games-with-greenfoot-without-greenfoot/