I know it's a mobile game but as a kid this was my jam arcade time waster. So to see if it held up, I reset my data and then plowed through it over a weekend and it kiiiiiiiinda does. The framerate takes a massive hit after the introduction of the endgame weapons like the super shotgun and the minigun, and the level variety is poor. The missions start off easy and then start taking oceanic levels of piss. But uh... the gameplay loop is kinda addictive. It's basic, but it's like baseline fun. It's like eating chips.