Well, I just finished up with Star Wars, using this frontend: http://www.emucr.com/2021/05/sega-model-3-ui-20210421.html
I wouldn't necessarily recommend a change, the controls will be the same and all, plus if you do get a new UI/frontend, you may as well get another copy of the emulator, as 2 UI's don't mix well.
Anyway, if you realize the default controls for most games are the arrow keys and A, S, D, & F, you use the S button for a few things in Star Wars. Including pulling the laser out of the light saber, shooting at specific targets near the end of some episodes, and continuing. You can get through the game without doing particularly well, btw. I actually failed the final mission(laptop mice really suck for gaming...), guessing there's probably an ending if you don't fail it, but you can get through the game. The light saber duels are bonus rounds, for the record, and not necessary at all. That said, if the controls weren't backward the keyboard/d-pad/joystick/whatever you use would be ideal there. Maybe they still are, just gotta get used to it...
The fact that the arrow keys/D-pad/joystick can move the cursor is why I never would have guess the mouse would have done anything.
Looking at the Harley Davidson cabinet, it had a sit on motorcycle like Super Hang-On. I wouldn't know how emulators generally handle that. I never go for racing games because of that, or the wheel & pedal thing. No idea what the best possible control scheme to emulate those kinds of controls are.
Personally, the one Model 3 game I have trouble with is L.A. Machineguns. Can't figure out how to move that cursor at all. That said, once you properly calibrate the gun as the mouse in service mode, The Lost World: Jurassic Park works great for a light gun game.
I've experimented with the arcade boards Demul emulates, if you think you'd be interested there. I can help a lot more with that stuff(just actually use MAME for the Cave CV1000 games, they actually crash Demul, and some of the NAOMI games actually have bad sound in the emulator, and some won't run at all. Most will, and will have decent sound. GD-rom/CHD games need to be in a folder instead of a .zip file). There's a Star Wars racing game for Hikaru(this board also has the latest Space Harrier game, Planet Harriers, and on top of the hikaru.zip BIOS there's another called mie.zip). Except I never tried any of the 3 Gaelco games. So, basically you have the best luck with Atomiswave(1 BIOS, games look and sound great).