Vex 4 is the fourth chapter of the Vex stickman series, and it is much bigger than the earlier games. The main adventure is split into 9 acts. Each act also has a hard mode that remixes the same layout with nastier traps. When you are done with those, there are two extra challenges: Vexation, a long gauntlet for players who want punishment, and the Challenge Room.
Each act asks you to run, jump, slide under low gaps and swim through flooded sections without touching spikes or saws. Swimming is the new skill most players need to get used to. Your stickman floats up slowly, so plan where you will surface before you dive. Checkpoints are spread through every act, which keeps the difficulty fair even when the traps get tight.