Hey, thanks so much for playing! This is definitely inspired by NintendoDS Pictochat nostalgia for me (first console I ever got), a lot of games "nostalgia" refers to gaming consoles that were released before I was even born, so I thought I'd give the DS a bit of love :)
The drawings affect the endings only in terms of how "rushed/unfinished" they are. You don't need to have amazing drawing skills to finish the game!