Choose the "Continue" option at the main menu, then enter "TONYGOLD" as a name to unlock a cheat menu with options for level selection, sound test, and difficulties.
Use these level passwords:
1 BUZZWORD
2 FOREWORD
3 COOKBOOK
4 FEEDBAGS
5 HAMSTEAK
6 DAYBREAK
7 SUNLIGHT
8 NITETIME
9 EASTSIDE
10 BEATDOWN
11 VENGEFUL
12 FRISBEES
13 ICESKATE
14 PINGPONG
15 DOWNTOWN
16 CITYMAPS
17 DUMPSTER
18 WATERWAY
19 TIRETUBE
20 YETIRAFT
21 SUBURBIA
22 HOUSETOP
23 CITIZENS
24 CHICKENS
25 SONGBIRD
26 PROVIDER