If you put me staring at the theme screen for 2 weeks, I could not have thought of this idea.
The main mechanic is brilliant. Customization directly ties to player controls, and I can figure out how the customization work quite well. This could definitely be implemented in a cool puzzle game setting. The polishing and artwork was simple yet good, giving this a pretty satisfying experience.
Hopefully this can be expanded---in my mind, the player could potentially enter a maze of some sorts? with every wall being a colour changing the player's controls.
Great job!