Each item automatically activates when collected and expires sometime after. Special Item Boxes can also be collected throughout the courses, providing bonuses during play. These can be purchased for $1.99 and will last one week. There is as well an additional featured called the Boom Boost which can grant extra bonuses. They are used to buy new playable characters, every fifth upgrade for a character, and can also be used to prolong gameplay and to purchase other incidentals such as Event tickets and storage for upgrades. Throughout the levels Red Star Rings can be found (only ten can be found on the course per day) however, players can purchase them as well, or obtain them from Prizes. Accumulated Rings can be used to purchase further content in the game, such as items and upgrades.

Like its predecessors, Rings can be collected throughout the levels or purchased via microtransactions. The goal is simply to run as far as possible without hitting a wall, falling off the course, or taking a hit with no Rings in the characters' possession. The playable character automatically moves forward at all times, so the player has to utilize the characters' skills and movements to avoid or overcome obstacles.

The game is an endless runner, where the player directs the playable characters through never-ending 3D levels, collecting rings and avoiding obstacles, mines and enemies. Sonic Dash 2: Sonic Boom uses many of the same gameplay elements from Sonic Dash.

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