hey! i think your game is really interresting and has lots of potential, however i noticed alot of issues with the math of the upgrades.
i dont know if you plan to adjust this, but i definitely feel like you should consider this as i have gathered following examples.
DirtMiner: the Dirtminer is fully automatic and runs permanently unless you turn it off, which i think is a great and potential filled aspect of the game, however i realized its reward size and after doing the math behind it i discovered lots of problems with it:
a LVL 1 Dirtminer Costs 50 satoshi: this dirt Miner Produces 0.000001 Satoshi per second. using this rate it takes:
21 months to regain the investment
0.000001*60*60*24*7*4*21 =50.8032
i doubt that this is the planned value, even to make the dirtminer 10x as fast would not be enough, i think an investment time of 2 weeks should be enough.
i assume that this feature isnt supposed to be the main part of the game, however 21 months until you make profit is simply not worth it.
i do love every aspect of this game so far even if they need a bit of tweaking, with all these flaws in mind i respect the time you have put into the game.