For the first the level are more like casual. Now after about world 35 above, most of the levels are kinda impossible to beat. This game had a horrible physic especially for any car race level, like your car had a really smooth tires and is racing on an ice track against snow mobiles. Some level even didn't bother match the physic and design, making it impossible to beat if you're playing it casually. I thought this game was a casual stress-free game, but it just adding more stress to me.