A long time ago I wrote a program called modigger.com in Turbo Pascal. (modify digger)
This allowed you to modify the digger screens. type <RETURN>
start modifying: Typing: F1 ALT-C F2 ALT-C F3 ALT-C F4 ALT-C
yealds: Now ALT-U and the digger.com is updated. Now when the game is played Screens 1-4 are skipped! (just get to the good stuff, in the old days this took about 15 min on 8088!) Eliminate all screens but one to practice! New screens may be created!