Playable but I don't recommend to play. The game is educational but with some wrong intimation. Numbers and mechanism are very very classic, or very boring seems from nowaday. All Items that can be purchased repeatedly have fixed product per second, and upgrades are just fixed multiplier that can buy one time. I lost interest after main simulation can be cleared in 30 sec manully and game lack enough automation at this point. Others simulations have longer game life but dont provide new things other than bigger fixed numbers and simple popular science descriptions.