The duel
Keep your biplane airborne, turn onto your opponent, and fire when the other aircraft crosses your line. Aircraft retain momentum: climbing trades speed for height, while diving restores speed. A collision with the ground or the other aircraft ends the exchange.
Game options
- Opponent: choose Computer for a one-player duel or Human for two players.
- Game level: So-so or Hard changes the computer pilot. This option is skipped in a two-player duel, as in the original.
- Acceleration: Manual requires explicit throttle input; Auto retains the original assisted-acceleration instruction.
- Sound: Fake Stereo uses alternating Paula channels; Real Stereo enables all four channels.
The original options appear one at a time. Press Left or Right to choose each side of the displayed prompt; the duel starts immediately after the Sound choice. A pointer can select the left or right side of that prompt too. Press R during play to return to the options screen.
Controls
| Player | Flight | Fire |
|---|
| Player 1 | Arrow keys | Space |
| Player 2 | W A S D | Shift |
Against the computer, use Player 2's W A S D and Shift controls. P pauses or resumes. R returns to game options. F enters fullscreen; Escape leaves fullscreen. Gamepads can be mapped to the equivalent keyboard controls by the browser or operating system.
After the match
When the original Again / Enough! prompt appears, press and release Left to reset both scores and play again. Press and release Right for Enough!; this runs the original shutdown semantics and returns to the game catalog. You can also click the corresponding half of the prompt.