Animal Merge is a merge game that shares similarities with Suika and 2048. The player attempts to merge everyday household and anthropomorphic objects to create new objects inside an enclosed area. They also attempt to earn a high number of points.
The enclosed area features a brown cat with yellow eyes in front of a blue sky. The player can use the far right button along the bottom of the screen to change the background to a backyard with a white picket fence or a living room with post-modern furniture.
The objects the player drops include pillow-style animal heads and bodies, chocolate chip cookies, donuts with sprinkles, tennis balls, basketballs, sunny-side-up eggs and round waffles. The player can only merge two matching objects at a time to create another object. For example, two eggs create a donut. No obvious connected progression exists by object type. For example, two merged waffles create a basketball.
Animal Merge tracks the player's score near the upper-left corner. The player can use a round-cornered square button marked with four white spheres to see a gallery of the progression of merges and objects. Although the game isn't timed in the countdown sense, it tracks the player's time as well. The player can also use various tools along the bottom of the screen to merge items faster.