Step into the boots of Bill Rizer with authentic 1988 NES pixel art! Move with A/D or Arrow Keys, aim upwards with W or Up Arrow, duck with S or Down Arrow, jump with K, Space, or Z, and shoot with J or B. Intercept flying weapon pods for the iconic Spread Gun (S), Machine Gun (M), and Laser (L) to destroy the alien Defense Wall at the end of each stage across all 50 levels!