What are some really fun, addictive, and time consuming apps on the iPhone?

So I have a really long flight tommorow and I want to pass time, so what are some game suggestions?

Games like Can you escape, or escape if you can. You can download Flow Free. Geared. 4 pics 1 word. True or False. Just look on the app store and go to featured free.

I can't tell you what apps I think are addictive, but I'll list off what apps I think are fun.

Dead Trigger. It's a pretty decent zombie shooter that's challenging (until you get the op guns) and has a survival mode.

Endless runner #307. Take your pick, they're all the same.

Frozen Synapse. It's a strategy game in which you command a small unit to complete various objectives for a resistance group. The game also lets you play co-op, though the host will need The Red DLC for that (not sure if it's available on iOS). The game'll set you back 7 bucks.

Beat Hazard. This one is a shoot 'em up where the enemies spawn and act according to your music. It gets pretty intense on higher difficulties. Not recommended if flashing lights gives you seizures. I think it costs 3 green-backs.

You can also look at review sites for more games.

Dream League Soccer, Cause of Death, Surviving High School