F3 – climber
F4 – umbrella / float down
F5 – bomb / exploder
F6 – blocker
F7 – builder / bridge
F8 – dig horizontal
F9 – dig diagonal
F10 – dig vertically
F11 – pause, also PAUSE key
F12 – nuke / explode all
F1 – decrease rate of release
F2 – increase rate of release
Can’t believe I suffered through 50 levels before reading the manual to find the keyboard shortcuts! The menu is so awkward on DOS, so I was so proud I figured it out that I forgot to check how to change the type of lemming from the keyboard.
In later levels it feels _very_ necessary to use the keyboard to do changes quickly. Also a little annoying that they basically require you to exploit what feels like quirks to get a lemming to change directions. And there are fewer valid solutions as it gets harder, which takes away from some of the charm. Still, a blast to play and addicting.