|Developer(s)||Bones Park Software Artistic|
The game is a clone of Space Taxi. It features a caveman who, in order to appeal to his beloved future mate, controls a stone-age muscle-powered helicopter, picking up passengers and flying them to the desired location for money. The player must venture through 69 levels, and must evade natural obstacles as well as hostile Dinosaurs and "Birds" (actually pterosaurs). Collisions with obstacles, hard landings and touching obstacles with the helicopter's rotor inflict damage to the helicopter. Also, powering the helicopter exhausts the pilot, which may be recovered by picking up fruits knocked off Tree with Stone. Stone may be also dropped on a hostile monster, knocking it out for a short time.
The Commodore 64 version of the game also features a two player hotseat mode, in which two players compete to finish the level, while the DOS and Amiga versions feature a cooperative simultaneous two player mode.
In 2013 a remake of the game, called Cave Express, became available as open source software for Windows, Linux and Android. The source code is hosted on github under GPLv3 and the data content under CC BY-NC-SA license.