Nice little idle game.
Thou I doubt anyone who’s not familiar with unity/game development would know what the show / hide particles options do.
The 2^63 max cash is a bummer thou… might consider using bigger numbers like BigInteger (presuming you’re using C#) or something similar… even en 128-bit structure would be sufficient. Or at least an unsigned long (thou the difference would be minimal).
All in all a good game.
Had to give it a 3, the idea and game are good, but sadly it is very poorly coded... the buttons don't always react, they don't react at the time they should (yey, got teleported into a missile... again) or they react after you die (really helps now..)...
I added customizable controls in the options menu. Couldn't you change the z button to y? Or did I misread your comment?