Get a copy of Super Clash Crossover when it releases on Steam (Windows/Mac/Linux) and get an exclusive Backer Badge next to your name in-game, shown on the character select and match results screens. The estimated delivery below is for release on Steam Early Access. Also this is a discounted price. I'll launch at around $15.
Each character will have their own level for this mode. It's sort of like Smash's Break the Targets mode except the targets are pixelated versions of your faces. Your face will also appear next to your name in the destructible credits stage.