Best mobile game out there. Buying things is completely optional/cosmetic and only a smidge competitive but thats only if you're going for high spots otherwise it's not a issue. The only improvement I could ask for is a zen mode where it doesn't get faster and you can't die (maybe you go back like in the tutorial) to truly have a way to play the game casually oh, and you'd be able to continue from where you left off. Just get the game. It's free and fun.