Agreed, I was okay for up for jump with my excellent wico joystick (Gods, Magic Pockets, and other atari/amiga native platformers) but sorry not for arcade adaptations (Ghosts&Goblins, Toki). I guess we'll have to agree to disagree on that particular point
Generally speaking arcade adaptations which had to change the controls (because few people had 2 button joysticks until 1993) are harder to control and frustrating. I loved Mortal Kombat port (with 2 button) though. They could squeeze the moves in 2 buttons. Overall not a bad port on A500. Colors suck but plays fine.
Nowadays up for jump with a joypad is a big no no. joypads are the reason a second button is needed for jump. I got used to joypads, even if decades ago I only used the wico for my favorite games. BTW wico has a second button too.