- You can use the arrow keys to increment/decrement values ±1 (shift-arrow ±10; control-arrow ±0.1).
- Unlike most ‘artillery’ games, here both ships fire simultaneously, so get all the values entered before you hit “Fire!”.
- Shots become “live” after about a quarter-second, meaning your own shot can kill you.
- Shots that are still in flight after about half a minute will self-destruct.
- The “GAME OVER” screen lasts five seconds. Then you’re thrown back into battle. Neverending battle.
- If you get a boring game layout, which happens, just reload the page.