ChronoSplit is an endless runner where you control two characters simultaneously — one in the Light Realm (top half of the screen) and one in the Shadow Realm (bottom half). Both run at the same speed and respond to the same input: tap to make both jump at once. One shared tap, two fates. If either character hits an obstacle, you lose a life.
Six obstacle types appear across both realms: ground spikes, ceiling spikes, solid blocks, vertical lasers, floating blocks, and NONE (clear lane). Collect crystals that float through both realms for score and coins. Power-ups appear in both realms: Shield absorbs one hit, Slow Time reduces world speed, Magnet extends crystal collection range, Double Score doubles points earned, and Phase makes both characters briefly pass through obstacles. Upgrade Shield strength, Magnet range, power-up duration, Revives, and Coin Multiplier in the shop using collected crystals.