Not the point: college is for CS. Not for "building on the work of others." You learn the basics that everyone needs to do the advanced work. If that isn't need

Not the point: college is for CS. Not for "building on the work of others." You learn the basics that everyone needs to do the advanced work. If that isn't needed/useful then you need a vocational school instead of a CS program. Making people do continual simple demos and nonsense programs instead of teaching them actual CS is BS. They can be simple programs, they don't need to build huge things, but what they build should reveal and teach them things beyond how to shift text around the screen.