A hack released Wednesday allows two players to explore the massive world of Super Mario 64 together. The hack was released by a gamer named Skelux, and allows players to control two different versions of Mario.

The hack is only playable on an original 8 MB Super Mario 64 (U) Rom version of Super Mario 64, so you’ll need a Nintendo 64 emulator to run them. YouTube comments on the above video indicate some players have already been able to run the game successfully.

Skelux’s website mentions other hack projects he’s worked on, including a new version of Super Mario 64 with 120 brand new stars to unlock.