Spy Bot Chronicles was definitely worth the 59p, but Wolfenstein RPG has truely filled the temporary void for me. Awesome game.
If you don't have duke 3d yet I would defenetly suggest it. Is awsome and it has loads of levels. Btw the controls are not as bad as everyone claims. Just use tapshoot and digital controls. It's like they are made for each other. Also has a lot of stuff not in other shooters( boot prints of blood after walking in blood) very detailed retro shooter.
Civ rev is great and rasta monkey is pretty fun too and if you still got money left you could always gift it too me..... jk
Skabooki is in my opinion the best puzzle game on the app store right now. It's the most polished. Moonlights is good too. Get both!