Any tips on what I need to do for this achievement? Love the game, btw! :)

What can I say, for unlock all upgrades, I had make money for at least 94650?! Absolutely crazy! https://testx-steam.c5game.com/sharedfiles/filedetails/?id=3437027876

Does anyone has those achievements and can give some suggestions? With all the upgrades bought, I have too many levels that I do not see how to solve without using items, so after level 55 I do not have any items left, but still a solvability level less than 80....

In this game there is a feature that is different from the flag, to mark mines position you're not actually sure about? (like the question mark in minesweeper)

I recently bought this game because how can you say no to such a nice sale. BUT my precious little nostalgic heart got hurt by the fact that apparently, the developer changed the 1 in classic mode to look like an I. Are we in ancient Rome all of a sudden or what? Why are they now light blue instead of dark blue? Is this a bug? Will he change iit back to how it was before (a proper 1, as can be seen in various YT videos and screenshots of the game)? Questions upon questions....