I was viewing them via a small mobile screen, not high DPI, not fullscreen. And to me, they simply don't look good the way they are.
But if you folks enjoy them, go for it. Otherwise taste is subjective I think.
It's amazing what people achieved with the resources of the '80s, creating fairly enjoyable visuals using extremely limited technology.
Another example from the early '90s is MARS.COM (1) by Tim Clarke (1993). Just 6 kilobytes and 30+ fps on a 12MHZ 286 (2).
1. https://www.youtube.com/watch?v=_zSjpIyMt0k
2. https://github.com/matrix-toolbox/MARS.COM/blob/main/MARS.AS...
(A pixel-art specific upscaling filter would mitigate that issue, of course.)