To be honest, that "auto mode" when you draw kinda happened to me when I was writing the lore pieces of our jam game, and even when coding. I guess it happens when you do the part that you enjoy the most.
Love to see how you evolved as a game developer in general from this project, now it seems incredible to think that Where's Matcha is your very first solo game, I remember struggling a lot my first time with UI and web builds (and of course screen size), but you really made it work in 1 week, that's awesome