Sorry, i'm not sure if you guys still take any suggestions or do any patches updates anymore.. but, this is my short suggestion..
In order for the player to select and choose the number they want to put in the box, they'll have to click on the correct number/position box from the big box, right?
I'm wondering if it's possible to update a patch so that we can flip the numbers' position.
current (small) number positions
Is it possible to update/enable an option so that the player can choose to flip it so it looks like the following
(for people whose more used to using the calculator / keyboard numbers like me)
ps. please fix or redirect the http://www.zenofsudoku.com/contact
address that the in-game Feedback button leads.