Short info:
This games main (and only) objective is to get as far into the tunnel as possible. Without user input the worm just falls down so press [ANY] key or mouse button to keep it from crashing to the floor, just don't push the key too long or the worm crashes to the ceiling ;-).
The in-game music is Rob Hubbard's (and so is the only sound effect when you die) but this μ-law version doesn't sound at all as good as the original SID version :-). Sound is disabled by default but pressing [F5] toggles it on and off. Too bad the sound samples are a hefty 460 KB download :-(.
This one was made during the Easter holidays in 2002 and later "finished" in August.
Have fun!