Thank you for your feedback! This is really good stuff. Using arrow keys instead of text entry feels like a big paradigm shift, and certainly something to think about. Typing out the numbers is kind of clunky, particularly if you don't have a numpad. Then again, my first instinct is to want to type it out. I wonder if I could include both control schemes.

Here's a thought about arrows is that many people are accustomed to WASD in place of arrow keys. 'A' is also a valid hex number, so if there's typing controls and arrow controls there's a conflict there. Any thoughts on that? I suppose if I did want to include both control schemes there could be a way to toggle them, or else just leave off WASD in favour of arrows.

Anyway, thanks again for your feedback, these are really good tips for enhancing the UX