Mario Adventure is a hack of Super Mario Bros 3. These are the most noteworthy characteristics of it.
- Mario can keep a power-up in reserve, similar to how Super Mario World works except the change is immediately effective.
- There is a new power-up, Magic Mario, which can stomp on more enemies than otherwise possible, shoots extremely powerful projectiles, and can take a few hits before losing the power-up.
- There are 7 worlds which Mario can visit in any order. Each world has a key hidden somewhere within it.
- After finding all 7 keys and beating the 7 worlds, Mario can access the 8th world to win the game.
- Almost all levels end with a Boom-Boom battle.
- Mario Adventure includes its own custom palette for graphics rendering.