How does your submission match the theme?
One button does four things. When on the ground, the ball jumps with an upward thrust. When in the air, the ball is propelled forward and its decent is slowed. If the button is held when the ball land on the ground, the ball will change directions. If the button is held when the ball hits a wall, the ball will wall-jump.

Another aspect of dual purpose design is the weapons surrounding and circling the ball. Not only are they used for damaging enemies, but they are also an indication of the player's health. The more damage the player takes, the smaller the radius of the weapons become.

Made for Windows.

Third-party resources
Game Maker Studio. Music by Waterflame.

Contributors
Finigini, Waterflame.