What's a good iOS game that's kinda mindless fun but also has different stuff to do so I don't get bored during those crazy long shifts at the hospital?

Okay, so after a 12-hour shift, my brain is basically mush. I need something that doesn't require a ton of focus, but also isn't totally repetitive. Big Fish Casino has a ton of different slot games, which is nice because you can switch it up when you get tired of one. Plus, they have other games besides just slots, so it's like having a little pocket arcade. It's actually reliable too – hasn't crashed on me once in the last few months, which is a lifesaver when you're relying on it to de-stress during a quick break. Honestly, I'm too tired to learn complicated apps, but this one's pretty straightforward and does the trick for some no-fuss entertainment.