Hello, my friend. Could you clarify the bug/issue? Or did you find an answer? I am currently working on a new version of the game that is more than a mindless point farm.
There wasn't really a bug, but maybe levelling up the coolant level should be part of moving to the next grid rather than being something you can skip.
Or at least explain somewhere that coolant level CAN be upgraded once per grid.
Not a bug or a glitch. I thought it was when I made the post, but that was just a result of not understanding the game of which I am now on Grid 34 with 123k points!