Space Jam

Space Jam is DanMat's dependency-free rebuild of an earlier personal Akihabara-engine shooter. The ship stays on the left side of a horizontally scrolling battlefield while enemy fleets arrive from the right in formations and distinct movement patterns. Ten themed sectors structure the campaign, each concluding with a boss and visible health bar rather than continuing as an undifferentiated endless wave.

Scouts, sine-weavers, diving attackers, kamikazes, gunships, and armored turrets demand different movement. Weapon pickups widen the main spread as far as five projectiles or add homing missiles, while temporary and defensive drops provide rapid fire, shields, smart bombs, and extra lives. Smart bombs clear hostile bullets and damage all active targets, giving the player a limited answer to crowded screens. Consecutive kills raise a combo multiplier, connecting aggressive target selection to the final score. After a run, three initials can be attached to the shared online leaderboard, with browser storage used when the remote board is unavailable. Ships, opponents, effects, and backgrounds are drawn procedurally by the plain Canvas JavaScript implementation. The complete source is published under the MIT licence.

Move the ship with WASD or the arrow keys. Mouse movement and touch dragging are also supported. The main weapon fires automatically, so use movement to align shots, avoid enemy craft, and pass between incoming projectiles. Press B or click the bomb control to activate a smart bomb. Press P or Escape to pause.

Collect W pickups to widen the weapon spread and H pickups to add homing missiles. Rapid-fire, shield, smart-bomb, and extra-life drops are marked R, S, B, and L. Keep a smart bomb available when a boss or dense formation fills the screen, because it removes hostile bullets as well as damaging enemies. Chain kills without long gaps to increase the combo multiplier. Each of the ten sectors introduces a themed enemy mix and ends with a boss; read its movement and firing pattern instead of remaining in one lane. Complete as many sectors as possible and submit the resulting score to the leaderboard.