While I'm not well-versed in the "shmup" genre, I found S.C.A.T. to be pretty fun all things considered. There are obvious limitations seen in the game due to the hardware it was originally developed for, but for what it is, it's solid.

I wish I had to urge to finish it, though, since the gameplay largely doesn't evolve past the first mission; the only real difference is that there are just more projectiles; not what I'd call an engrossing enhancement of difficulty, per se.

Anyway, it's on Switch Online and for a brief, curious glance, it was worth the shot.