MISSILE INVADER

1. Slide the power switch to ON. The U.F.O. and the Invader start moving right and left.
2. The two action buttons move your missile base; the orange button on the side fires.
3. You have 50 missiles. See how many points you can score with them.
4. If an Invader's missile hits your base, you lose 5 missiles at once.
5. If your missile meets an Invader's missile, yours disappears.
6. The score flashes when fewer than 10 missiles are left. When they are all gone, the game is over.
7. To play again, switch off, then on.

The counter only has two digits, so past 99 it borrows letters:

245 is the best score the sheet says you can get. Try to get it!

P power · ← → or Z X move · space fire · L glowing LED mode (Esc to leave)

Rules from the original 1980 instruction sheet. Nobody has dumped this chip yet, so the speeds were measured frame by frame from a video of a real one being played.