Space Shooter

Controls Goal: your ship fires automatically — shoot down the descending enemies to score (10 points each; big enemies take two hits and give 20). Controls: mouse follows your pointer, on touch drag across the board (or hold the ◀▶ buttons), on keyboard use ← → or A·D. Shots fire every 0.25 s on their own. Tips: enemies sway as they fall, so get under them early instead of aiming for long. Letting an enemy reach the bottom or colliding with one costs a life (3 total) and gives 1.5 s of invulnerability. Clear a wave to start the next, which is bigger and faster. P or Esc pauses. Your first input starts the game.