Contra

1980s Run & Gun — Teaches side-scrolling shooter mechanics, weapon pickups, co-op (2-player), enemy wave patterns, and the iconic Konami Code.

Concept: Side-scrolling player with 8-directional shooting (aim while moving). Jump, crouch, basic spread shot.

Concept: Floating weapon capsules: Spread (S), Machine Gun (M), Laser (L), Fire (F). Each with unique behavior and ammo.

Concept: Soldiers, turrets, wall-mounted guns, flying drones. Pattern-based wave spawns. Screen triggers new waves.

Concept: Multi-phase boss battles: tank, wall turret, alien heart. Weak points, attack tells, bullet patterns.

Concept: 3 stages (Jungle, Base, Alien Lair), 3 lives, 30 lives Konami Code easter egg, continues, ending sequence.

5 steps