In full honesty i've never used spotify and seeing people around me struggle with it while i'm running off a ipod touch for music makes me feel lucky and concerned
Casually buying SOAD albums on ebay for no reason other than I want to play them on a discman has got to be one of the dumbest things i've done but why not
I don't have a wii u anymore to test it myself, but if homebrews are not visible on the wii u menu I think you can press L + R + minus to open the plugin menu, there should be an option called "homebrews on wii u menu" or something similar
Or when your player dies, you can say in code, if enemy exists, do nothing, but if enemy does not exist, then create enemy at certain spot. (This would be a pain tho for lots of emeies)