In my code I had coded a scaling option, but while packaging the game, I needed to "lock" this scale. Maybe there's some native ways of scaling, good to know about the nearest-neighbor!
The sum was supposed to be there, I think I messed-up something in my code haha. I've added it to my backlog!
I remember trying the game you shared, but haven't noticed the sounds, they are simple, yet great. Pixel scaling is also much better. Definitely something to learn from.
Thanks :)