I can't get tier 8 to breed past the solid colored first one. Do I need the next level of research to unlock it or is that going to be in the next game?
I think you should remove the idle punishment for clicking another tab, I would otherwise spend much more time reading wikipedia about the elements I'm creating, and their industrial uses.
Why link to wikipedia and then punish us for spending time off page?
FREELANCER! Its been bugging the heck out of me all day! This game is just as fun as that was and I'm looking forward to more updates ;P. There cannot possibly be just one person making this can there? If so you need to go work for codecademy and usher in the new era of indie programming!!!!!
Higher denomination coins would greatly reduce system resource use towards the end of the game. Maybe gems in different colors? My fan was whirring full speed at the end! 5/5