I'm not entirely 100% sure that you don't have these, but you could consider:
1). A music player.
2). A text-based RPG for your arcade. It doesn't have to be too complicated. Also, you could add in hangman.
3). A text-to-binary converter as well as back.
4). A word program.
5). As soon as Scratch 2.0 rolls out, you could add in a clock/calendar. Or, you could set up a remider system.
I hope that you like my ideas!
Offline
You could also have a simple game, such as bubble pop, or something like that as a game. Another idea is customizable backgrounds, colors, and other things. You could even have a coloring app if you like.
Offline