"Bitcoin Billionaire" and "Tap Titans". Really great games imo, but both have the problem that the units get ridiculously big very fast. Instead of k, M, G, T they go to A, B, C .... AA, AB, etc, losing any meaning after some point (Oh look this upgrade costs 17 AC, but I only have 99 AB, hmm). Also the only active gameplay they offer is tapping on the screen like crazy. I wanted to improve on those aspects
I'm aware of the "abuse upgradebutton" bug. Was only a matter of time until someone discovers it It's because I wanted the money to "fade" in/out. And while it's fading, you might have enough money for another upgrade. Will see if I can fix this, but for now it's not critical I think.
As for the puzzles, I build the minigame so that it can scale. Thought about adding harder versions where you have to solve 12 or even 16 bit. But I think "aint nobody got time fo dat"