What's a good iOS game for killin' time when you're stuck waitin' for the rain to stop?

Look, I ain't gonna lie, Archero 2 ain't exactly built like a brick house, but it's decent for passin' the time when you're stuck inside waitin' for the weather to clear. Graphics are alright, nothin' special, but good enough. Gameplay is simple – you run around shootin' stuff. The tutorial is useless, but once you figure it out, it's pretty straightforward. I wouldn't say it's actually rugged, but it's survived a couple of accidental drops onto the truck floor already. Biggest issue is the battery drain; feels like it sucks the juice outta my phone faster than a power saw through plywood. So, yeah, gets the job done, but keep a charger handy. No BS, it's free to play, but they try to get you to buy stuff, so just ignore that.