They are really expensive, even if you reset for a multiplier... Only thing I can recommend is leaving it to idle so money can build up and then you'll be rolling in it when you return to the game? We're going to be tweaking the numbers and balancing after we deal with save data and the errors people are encountering. It's so nice you see the potential thought :D It's just a wee baby alpha build, but we have lots of neat things planned for the future and will keep on updating and doing our best to implement player's feedback. Thanks!!
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Haha yeah I know! We're working on it... it's kinda funny to see the most expensive donut though :P