Really enjoy Picross puzzles, so you have no idea how happy I am to find this on NG. Even better that this has some sort of progression system with xp, which I've yet to find in other picross games on mobile. Could wish for some more color and user submitted puzzles and stuff like that. I was going to say I'd like X marked tiles to not be filled when clicking them, but it seems from the description like this is something I can unlock somehow.