For the code, it is indeed a bit annoying on keyboard, but I assumed people would use thir digits keys or numpad (which works). Thats why I focused on making the menu to work well on gamepad. Tho now that I think about it, its not obvious that you could enter numbers directly. I should have added a tuto in game :(
Yeah base 6 puzzle I kind of regret. I assumed people would use an app online to do the conversion (a bit like a crypted message), but actually it would have been more fun to have it doable by head easily once you figured it out (something like 0009=0013).
I'm glad you liked it, thanks for playing!