I downloaded an app for my iPod Touch a couple of days ago, simply called Apollo 11. (Imaginative!)
It has seven levels:
1) Training - the flying bedstead
2) Extract LM
3) Mid-course correction
4) Lunar landing
5) Dock with Columbia
6) Mid-course correction (again)
7) Atmospheric re-entry
I've only played (1), (2), (3) and (4) so far. And (1) is the best part!
Still, not bad for 59p.