There is no Bloxorz 2. There is a sequel game called "On The Edge" which is practically identical to B-cubed.
The game called "Bloxorz 2" is a 16-level copy of Briker 1, but does have selectable levels using non-unique passcodes.
(see related question)
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When you play Bloxorz you will see passcodes that let you skip to that level if you want to play it again to improve your score.
There are two games that are given in searches for "Bloxorz 2." One is a game called "On the Edge" which plays like B-Cubed. The other is a copy of Briker 1 that is called Bloxorz 2. But unlike Briker 1, you can select the levels by 6 or 7 digit passcodes. (see related question)
the password for bloxorz is 189493
The code for level 16 on Bloxorz is: 000241. The code for level 17 on Bloxorz is: 683596.
The code for level 17 on Bloxorz is: 683596. The code for level 18 on Bloxorz is: 284933.