Anti-Grav

Anti-Grav is a classic game turned upside down... literally.

Roll your ball against gravity to victory as you play this endless, adrenaline pumping game and strive to achieve new high-scores. Reach target high-scores to unlock new color balls and new soundtracks. Choose from up to 10 different balls and 6 full length soundtracks. Try to out last your friends and survive for as long as you can. Hours of fun in a compact package. This game has no ads, is free, and requires almost no permissions.

(Btw, to equip unlocked balls and soundtracks, select the menu button, then select the unlockables button)