That's certainly a good suggestion, ultimately I'd love to have these three things in place;
- List of last used blocks
- List of favorites the user can select
- Save blocks to the number keys on the keyboard as hotkeys (1, 2, 3 etc.)
Having hotkeys for navigating the toolbox and selecting different blocks should certainly be doable, I'll see what I can do!
(PS. I remember playing your games when I was little - thanks for the memories hah)