After getting infinty money trought interest, i bought damage till i get infinty as damage and got NaN money (i couldn't bought anithing). I was doing infinty damage till the message ouf getting out memory crashed my game around wave 1005. Also there is a bug witch allow to get more than the normal max by getting as close as possible with the factory (getting 49% multishoot and then buy x25 giving us 74% to do a multishoot) working on almost every upgrade
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Sorry to hear that. This is a known bug and XmmmX99 is already working on a solution. Please be patient, it might take a while. :/