It is just a level that you can move around in.
level 20 the passcode is 19094
The cheats to the last level on orb on coolmath4kids.com is: 51210
level 1 000000
54974
84378
63157
There is no level 22 on Orb2 or Orb2 TNL. There are Bonus Levels including belts and endless levels. Level 21 (end screen) is 51210.
Level 21: 51210
the last password is 51210
I have done it and the code it 63204
level 12 is 10131 level 15 is 73108 level 21 is 51210
The last level is 999 The last level is 999