Nintendo’s latest mobile game is now available for iOS devices, a day before its official target launch date. The game is based on the Nintendo game created in 1990 for the NES and Game Boy, and re-released/re-made a bunch of times over the years for various Nintendo consoles.

Dr. Mario World, the iOS game available now, is, like its predecessors, a matching puzzle game in which you as Dr. Mario (or maybe you’re just a colleague of Dr. Mario? It’s somewhat unclear) cure “viruses” by matching pill colors to the little jerks. This version has a number of additional gameplay features compared to the first, which was pretty Tetris-like in play. It also focuses on drag-and-drop mechanics, instead of manipulating pills like Tetris blocks as they fall.

For instance, you have other doctors from the rich Mario fictional world to call upon for help, including Dr. Peach and Dr. Bowser, as well as assistants, including Goomba, Koopa Troopa and others who apparently never either attained or aspired to professional medical doctor status. These have different skills that can make virus busting easier, and Nintendo plans to update the game with fresh doctors and assistants regularly.

Multiplayer is also part of Dr. Mario World, and you can go head-to-head or work together. Predictably, if you’ve followed Nintendo’s foray into mobile titles, this one is free-to-play, with in-game purchases for unlocking more play time and unlacing additional characters and upgrades.