You are a specialist for cave creatures which you have to collect.
Grab the torch and have a look around. (Be patient; it might take a while to get used to the dark...)
From now on, click where you want to go (e.g., click the centre of the bottom border if you want to go south).

The cave has eight levels. You start at the bottom level (level 1).
You will find ladders in some places. At each level there are three ladders leading up to the next level. Click the ladder to move between levels.
Signs indicate which level you are in at the moment and also the coordinates of your room.

There are 15 bugs in the cave (some variants have only 10 bugs, see below).
You win when you have collected all ten bugs.
To collect the bugs, simply move them into the array at the right border.

Variants 2 ,3 : These are somewhat easier variants with 4 and 2 levels.
Variants 4,5,6 : Similar to variants 1,2,3, but here the cave contains exactly 10 bugs, so you have to look somewhat harder and find them all to win.
Variants 7 to 12 : Similar to variants 1 to 6, but no room number is displayed.

Good luck!

Related games: 'Random Cave', 'Cave', 'Cave II', 'Cave Critters'.