It does depend on if you're planning to implement mouse support or not, If you are I think it's fine to ditch the keyboard controls & just let everything be clickable using the mouse.
If you still want to use the keyboard controls, maybe try implementing so the options can be selected using arrow keys (imagine a menu system on game consoles). I think it would be less clunky than having to use the number keys!
For options that only has a single option or no option at all, any click/button press should just continue to the next screen.
These are just my suggestions though, feel free to experiment with what you feel is right ;)