NN555Serpent is an offline snake trail game built for short, focused play sessions. Play three distinct modes: - Classic Survival for open-ended runs on a 14 x 14 board - Step Collection for ordered target runs with a 60-step limit - Route Campaign with handcrafted levels, narrow corridors, and moving hazards The game focuses on planning safe turns, growing a longer body, and building score through clean collection chains. The board shows score, length, combo, step count, and the current target so each run stays readable at a glance. Helpful features include: - Swipe control with adjustable sensitivity - Speed assist, sound, vibration, motion effects, and theme controls - Local progress tracking for best scores and cleared route levels - A replay view that keeps the last 12 steps after a failure - A pause countdown before play resumes All progress stays on the device. The game does not require an account, cloud sync, or an internet connection to play.