I didn't know if it was okay to post it... If not I'll delete it. If I save the game and refreshed the window, the cost for the click upgrade would reset. So, once it was I was getting millions per enemies clicked. I would rack up damage, move on, save, then refresh.
It's ok. No need to delete anything.
And it's kind of weird becous game saves itself (in portable version). There is no button to save and when I tried it, when I refreshed window started from the beginning.
It was so long time ago that at this point i've no idea how to fix it.
Well anyway, thanx again for playing :)