Hey!
I reached 2 endpoints:
1) around lvl 8500 in hard mode lvl jumpes back to 1 but everything remains the same (amount of white cubes and things brought with that) So I end in en endless mode where I let the game run over night and get around 300 M Orange cubes per run. Over night is around 5G Orange Cubes in Sum
2)Values can jump to infinity around roughly 1e350. So I reached Infinity white blocks und infinity dmg etc. At that point I can Spend white blocks like I want they don't get diminished but I can't use the max button anymore. And I can't increase dmg or whatever.
I suggest working in the 2nd point in prior cause this might open up the possibility to get infinity orange cubes what will blow up the game.
On the other Hand I would like to ask for a button where you set a lvl of white cubes e.g. 3ZY and every upgrade is bought up to that amount of white cubes. Cause at lategame it is realy anoying to click the upgrades single.