What's a good iOS game for when I'm totally drained after a long shift but still wanna rock out?

Okay, so after a 12-hour shift at the clinic, I'm usually too tired to learn complicated apps. But I still wanna unwind, you know? I found Guitar Band: Rock Battle, and it's actually pretty good. You get to be in a band and play different instruments. It's not like I'm gonna be shredding solos at Lollapalooza anytime soon, but it's a fun way to de-stress. The controls are easy, which is a HUGE plus when my brain feels like mush. I've been playing it for a few weeks now, and it's actually reliable – hasn't crashed once, which is saying something. It’s a no-fuss approach to just having some fun. Sometimes, simple is exactly what this nurse needs after a day of…well, you know. It’s kinda like having a pocket concert, but without the screaming fans… or the need to actually leave my couch.