Zachtronic Industries' unbelievably addictive "educational" game SpaceChem is now available on the iPad for a scant $5.99. The chemistry simulator of sorts endeared itself to me when it first came out on PCs earlier in the year; to see it on the iPad is only logical, as the game was meant for portability and user-friendly touchscreen controls.

If you have not played SpaceChem, I greatly recommend you do. Despite it's crushingly steep learning curve, it still remains one of my favorite indie games of the year; it provides the sense of reward and success that most games would dream of achieving. Go ahead and download it here; there really is no reason to hesitate on one of the best puzzle games released this year.