It always depends on the game and what it needs. Some games just need some visual touch-ups, while some require an overhaul of an entire system. Whatever suits the game best is what should be changed.
Just had a karaoke night last night! Some of our favorites were:
Born in the USA - Bruce Springsteen
Livin’ On a Prayer - Bon Jovi
I Want it That Way - Backstreet Boys
Industry Baby - Lil Nas X
and various Disney songs.
I would say I’d look back at it as a better game than I do now; however, I feel it would make the game much less memorable (especially considering Spirit Tracks). I feel like the Temple helps me differentiate it from other handheld games a bit more.
My first was the Mt. Plymous one as well. I still hadn’t quite figured out the freedom in the game yet and thought all the NPCs were telling me to kill it, so I threw myself at it over and over until I finally beat it. It at least served to teach me better techniques.