ah man I really like this mario picross game but...
mario's levels help you too much. hf.
also the one help it COULD do with is letting you know when you've filled in a bunch of numbers
like uh...
how Picross S does it and how World's Biggest Picross on my phone does. It lets you know when you've say got a set of clues on a line and you're sure that the 4 that's in there can only go in one place so you plonk it in and the 4 gets crossed off on the clue so you know you've done the only 4.
@Felthry Well, if you're on android I can recommend a couple (they might also exist on iPhone but I dunno). the Konami one is pretty good apart from the fact the boss levels only unlock every 3 hours and it seems fairly short (I completed all the non boss levels REAL fast so I now gotta wait for all the boss levels to unlock and do them every three hours or so x_x; and unless the one that's unlocked is completed you won't get the next one argh)
World's Biggest Picture Cross is great too!