I'd say Zeewolf is is worse than Zarch, which runs and plays well on an Acorn, the Virus ports are the ones that play poorly.
But you are correct, those were supposed to be early show off games, well Zarch was, and other computers tried to imitate it or come out with games with the similar small square play field surrounded by no draw distance style, however we did end up seeing deeper games later on much better and larger than Zarch, Zeewolf, and Conqueror despite the many games resuing that formula for years.
Air Supemacy is one such game
Also Guyle on the Acorn which even use a higher polygon flying character with similar particle effects
Much more impressive than the many limited square playfield games and clones out there, You'd be surprised how many games play like Zarch/virus out there with the same playfield, at a certain point that's not impressive anymore once you get past 1988. But these two are thee evolution of that idea in Zarch 9and Zeewolf).
Something about the bright almost neon color choices also makes these games age well visually too.
Rainbow Walker, on the Atari 800|400|XL|XE
Also the you can move the other direction as well, it doesn't only move downward, that was also something reviewers praised of the game for the time. Really ahead of it's time, Took the Q*bert formula, spiced it up in a 3Desque space, upped the color count and sprite effects, unusual enemy types, a powerup, bonus stages, some tiles can break, added a day night cycle, and you aren't forced to only hope, you can also walk on the tiles. I forgot how many levels it has but the game actually ends too, I believe it's less than 30 levels iirc.
There is a C64 version but it looks considerably worse.
Atari
C64
There's a big downgrade in resolution, single-colored sprite character, less enemies, less colors, and the visual effect isn't as smooth.