Q: How do I submit a screenshot?
A: Send Miriam a 320x240 thumbnail picture in png format.
Q: How come game X is not visible in the interface?
A: It is probably not tagged as a game: you can check it at
http://debtags.alioth.debian.org/edit.html; at the same place you can fix
the tagging if it needs to.
Q: The description of game X is really bad: how do I fix it?
A: Submit a bug report with minor severity; you can use reportbug for that.