There are no codes for the 30 levels. But users can write new levels, which can be accessed by loading their codes, which must be on a single line.
(see the related question)
The Code for Level 20 is 305883
The code is 51210. But this is the end screen. The last playable level is level 20 (code 19094 and hard to beat).
Level 20: 305883Level 21: 259205305883
Level 20: 305883Level 21: 259205305883
Level 20: 305883Level 21: 259205305883
54679
level 19- 839654 level 20- 305883
There ain't a code for it "/ Yes, there is. 15629. All the level is is nothing but red and orange.
51210
lCFF6Z4PWAQ
The code of level 20 of stackopolis is deadends
cricmania level 20 chats