Growing up my mom didn’t understand this and always insisted that the sink plungers were the only kind that worked (she also called them toilet plungers) and that toilet plungers (the fancy kind) were some kind of trick. Took until I was in college that I learned you shouldn’t have to break a sweat unclogging your toilet.
Here are games I like that are just mobile ports without ads or micro transactions:
Slay the spire
Monster train
Mindustry
Mini metro
Honorable mention to Vampire Survivors which is mostly a simple port, but it does incentivize you to watch ads for extra lives.