Batman Beyond: Return of the Joker is a movie game based on the straight-to-DVD animated hit. Here, you play as the new Batman, way off in the future. Batman has a variety of different suits that give him certain attributes. There are stronger suits, more agile suits, etc. The game features static comic book cut scenes, which is weird, because it's not even based on a comic book.
For some reason, developer Kemco decided that you shouldn't be able to save your game. So you can't. There is no saving in this game. Let that sink in. Meanwhile, gameplay consists of mashing whatever the punch button is on your controller, until all the enemies on screen are gone, which will allow you to continue to the next screen.