No ads except to continue your run, so that's absolutely perfect. I'd watch a few ads for some nice skins though, but honestly? We need more games like this. It's got all you need: the gameplay itself, and an optional way to make it easier for you and give something back to the developer. It doesn't even have a homescreen or settings and that's *absolutely fine.* I'm sure the dev doesn't earn that much from this game so I'm very thankful it even exists.