There's a red arrow on the top right where you can see the levels on your left. if you press quit > y
I know 30 is really hard always stay with 1 that i can't hit
there's a guy on another forum that went to lvl 32 it's even worse then 30 he said.
NorthViking
his score:
Levels finished: 31
Grenades used: 15091
Launches made: 788
Warthog bounces: 1971
Engineers popped: 5255
Time spent: 1:10:13
LVL 32 was really frustrating, tried and tried, then I stopped playing. lvl 32 is like a square, they are around the edges, very hard