Very good.
A very good concept for an endless “runner” game, and it is very fun, and especially satisfying scraping off zombies with nitro on. However, I give it 4 stars because there are too many ads. I know you need to make money somehow, and I get it, I just wish you could change it like how Egg Inc. works, watch ads to get bonuses, I watch a lot of ads there, and I bet a lot of others do too, but still a very solid game despite the ads.