Awesome one of my all time arcade favourites. Quick couple of things...
1. On my A1200 (64 meg with 030) the WHD version hangs and gives garbage before the welcome screen.
2. The floppy version works :-) In the Javelin if you hold the fire button down to get near vertical angle to bring down the BIRD when the bird is hit (ie the javelin leaves the top of the screen) the game crashes.
I thought you'd like to know.
Great game. Look forward to news on potential fixes.