Mini-games world.zip is an alpha file of the Minecraft map Anti-grav. race/bosses fight, made for Minecraft 1.7.10. It was published on June 30, 2016 and is 1.7 MB in size. Pre-release builds can contain bugs — back up your world before installing. For the full description, screenshots and every other version, visit the Anti-grav. race/bosses fight map page.
How to install: Extract the .zip and move the world folder into .minecraft/saves; the map then appears in your Singleplayer list.