Porting the game to Warp3d / Open GL support on the miggy isn't that trivial. It would take a long time - most of the assets could be used, however the 3d meshes would need to be remodelled. A lot of the game code could be ported, but graphic device based interface would need to be rewritten.
However it could be re-written in Torque, which wouldn't support the Amiga but would support the others (PC / Mac / Linux). What do you think?
In the meantime, I'll start testing the original game and provide a means for people to grab it as soon as possible.