Just type these codes when you're standing still in a level and don't have the game paused.
During game type: levXXXX.
For instance to skip to level 11 type lev480.

Skip to Level 01: 568
Skip to Level 02: 790
Skip to Level 03: 1048
Skip to Level 04: 1342
Skip to Level 05: 1672
Skip to Level 06: 2038
Skip to Level 07: 2440
Skip to Level 08: 2878
Skip to Level 09: 3352
Skip to Level 10: 3862
Skip to Level 11: 4408
Skip to Level 12: 4990
Skip to Level 13: 5608
Skip to Level 14: 6262
Skip to Level 15: 6952
Skip to Level 16: 7678
Skip to Level 17: 8440
Skip to Level 18: 9238
Skip to Level 19: 10072
Skip to Level 20: 10942
Skip to Level 21: 11848
Skip to Level 22: 12790
Skip to Level 23: 13768
Skip to Level 24: 14782
Skip to Level 25: 15832
Skip to Level 26: 16918
Skip to Level 27: 18040
Skip to Level 28: 19198
Skip to Level 29: 20392
Skip to Level 30: 21622
Skip to Level 31: 22888
Skip to Level 32: 24190
Skip to Level 33: 25528
Skip to Level 34: 26902
Skip to Level 35: 28312
Skip to Level 36: 29758
Skip to Level 37: 31240
Skip to Level 38: 32758
Skip to Level 39: 34312