When I was playing Mega Typhoon, I realize that Amiga 500 can do Tatsujin or Raiden, but I must admit that MT uses ECS Amigas and no music+SFX.
All the arcades needs music+SFX. Aniway, I should make first a small vertical shooter inspired in STAR FORCE (with 4 bitplane main scroll and 1 bitplane background scroll and some HW sprites for the stars). The game has to be fast like hell
but for OCS 512+512 standar Amigas.