http://www.aceinternet.co.uk/~mokona/The objective is simply to destroy all the green hexagonal tiles on each of the 100 levels. As you progress through the game, more types of tiles are introduced which make things more difficult and interesting (hopefully).
run the game by typing hexahop, or clicking on /usr/bin/hexahop.
(N.B. the game needs SDL libraries, and when it starts it complains about not finding certain save.dat files, but still seems to run OK).