Hi! I have made a shooter-game, but the theme is not very strong and i would like to improove that. Right now it doesn't matter if you are standing still or if you are moving, as long as you shoot the enemy. How could I add the theme of "can't stop moving"

Themes from what i understand aren't necessarily used throughout the concept of the game but can instead be applied to a certain mechanic e.g. you health depletes if you stop moving , something like that. We can chat more in the discord if you like