Subway surfers is a game where you must guide a submarine through a series of obstacles. The goal is to collect as many stars as possible. There are three types of obstacles: gates, elevators and switches. Each obstacle has a different speed, so you must be careful to choose the correct path.
You can also upgrade your submarine with new weapons and equipment. You can upgrade the submarine's speed by collecting coins and tapping on the screen when the submarine is moving at a certain speed. You can also upgrade the submarine's weapons by collecting stars and tapping on the screen when the submarine is about to fire its weapon. You can also upgrade the submarine's equipment by collecting coins and tapping on the screen when the submarine is about to launch a special attack.
The game ends when all obstacles have been cleared or when all stars are collected.
There are currently over 300 achievements in Subway surfers, so it's definitely worth trying out!