KEYS
Right Arrow - Move Right
Left Arrow - Move Left
Up Arrow - Climb up a ladder or jump up
Down Arrow - Climb down a ladder or jump down
Space Bar - Drops a timed bomb. The longer you hold the space bar, the longer until it explodes.

The "Volcano Hunter Trainer" version is one that someone hacked to make Volcano Hunter into permanent god mode. It's good for exploring without worrying about running out of lives.

The "Volcano Hunter" version is as close to the original as I could find. Someone removed the original high scores list but other than that I think it is pretty close.