This figures

When [John] Carmack was on vacation with his wife, he ended up playing some games on her cellphone, and he realized that the games weren’t any good. He then decided he was going to make a good mobile game. When he got back from his vacation he revealed that he had started working on Doom RPG.

Ok, maybe it is possible to make a decent video game on a cell phone, haha! If anyone could…. 🙂