No, Lake Superior has many rivers sticking INTO it :-). A lake is going to be the same elevation all the way 'round, no matter how large. In the unlikely event that there are two equal 'lowest points' on the periphery, one will quickly erode deeper and capture all the flow. Water being so, well, *liquid* a difference of just *inches* would be enough to generate differential outflow and voila - one output. Sure, subsequent input of a HUGE amount of rainfall at once could raise the lake level a teeny bit, and the once-upon-a-time short-lived other outlet might get some of the flow... for a matter of hours or days, then it'd be back to normal.

You've found one decent compromise to get labels visible across mixed dark and light backgrounds - the outlining works pretty well here.

The forest symbology is just OK, not great. Try some green scribbly swirls and see if that doesn't say "forest" better than the neat crosshatching. This way isn't bad, though.

I bet the city dots would look better as red fill of a black circle.

Other than those, and the river issues, it's a good map - gets the topography across fine. Depending on the purpose, 'simple' can beat 'elegant'.