Even crazier, the C64 version was only distributed in North America, ignoring the majority of potential buyers. And it apparently runs OK on PAL machines without modification.

One of the big draws of the game was all the detail in the backgrounds, and the little touches of animation. The C64 version being disk-only allows it to retain a surprising amount of this. As a tape game, the already long inter-level load times would’ve blown out and ruined the game.

I don’t think that an NES or Master System port could’ve covered the game even as well as the C64 version. But I agree that it is strange that there was no Mega Drive or SNES version. The SNES in particular could’ve replicated a lot of the arcade’s scaling effects with a minimum of trickery.