MyraHollow is a portrait-mode survival collection mobile game centered around maintaining warmth and avoiding the chill. Players slide their finger to control a glowing hexagonal character moving across the screen, catching falling light particles and coins to replenish warmth and increase score; warmth naturally depletes over time, and the run ends when it hits zero. Incoming ice comets, dark clouds, frost shards, and tracking shadows reduce warmth, requiring flexible movement to evade. Boost items such as solar burst, thermal shield, supernova field clear, magnetic pull, and time slowdown appear on the field; the shop allows unlocking skins and upgrading movement speed, warmth cap, and magnetic range. Simple controls with accelerating wave-based rhythm, balancing reaction and strategy.