Worm Apple Quest is a snake logic-puzzle platformer. Across 50 levels, the player helps a worm find and eat shiny colorful apples near floating platforms that hover in front of leafy backgrounds.
The game presents a wide range of apple colors, from green to golden. The apples hang mysteriously in the sky or rest atop a platform. The player can make the worm move up, down, left and right. They can also make it flip and slide along on either side of its body and bend across edges of corners. That said, if the player bends the worm's body into a square shape, they can't move it into any new positions and must restart the level.
After the player directs the worm to eat all of the apples, the game displays associated points. The player eventually uses the points to upgrade the worm's appearance to one of 10 new skin color and pattern combinations. If the player doesn't have enough apples, they can earn more by watching an advertisement.
Worm Apple Quest allows the player to reload a level at any time with a semi-circular reload button at the top of the screen. It also allows the player to skip a level at any time with an ad view.