Vex 3 is an action game where players control a stickman character across 10 standard and 9 challenge stages. The goal is to navigate obstacles by moving, running, jumping, and sliding to find a green door that transports the player to the next area. While navigating impediments can be difficult and require continuous jumping or flying, managing obstacles is not too hard. However, diving underwater poses challenges as the time held under water is limited before the player dies. Overall, Vex 3 is an exciting game that can provide an engrossing experience for fans of action games.