http://store.steampowered.com/app/608670/Miracle_Mia/

Miracle Mia is a cute action-adventure platformer where the main heroine must fend off against an invading horde of dark beings. Mia, with the aid of her tennis racket, defend and reflect the enemy's attacks right back at them. Using the skills of tennis, will Mia be able to overcome the trials ahead?