Works fine on my G5 Radeon 9600Pro setup with MorphOS 3.9. Small "bug" I think though.
When strafing, if you go too far back, your plane can never come back. Gets lost. When flying and you're on a bombing run, if you go too far to any side, it takes a while to "fly" back. It shouldnt let you fly off screen so far to where you're gone for such a long time.
Also when strafing, you have to be exactly on target to hit it, bullets look kinda lame. "Circles" instead of something better. Should have spent more time on that detail.
Audio is great, presentation is perfect, music is great also.