I've also just yesterday ordered a physical NES cartridge of the game.
huh? how did you manage to order a physical release of a homebrew NES game?
Lots of homebrew NES games have physical releases. If they are good enough. There's even a website you can order some that don't exist and they'll make them for you.
Not sure where this one came from, but I'm glad to have it. Will be paying for it today.