Boulder Dash by Oliver Cyranka (1986)
Another clone of BD by Oliver Cyranka (c) 1986.
The game is very similar to BD but differs significantly in some aspects. First of all, it lacks the possibility of remote picking diamonds (or making a path). Also one cannot release flies running on their left side. The caves are not designed to be too much sophisticated, actually they are trivial, but the strange dynamics of the game makes it quite hard and sometimes one needs many attempts to complete it. There is only one level of difficulty and after the last cave (P), game starts again from A.
In general, the engine behaves completely different in comparison with the original BD. Lava kills flies only if the contact occurs at the particular side. Growth of lava is not balanced properly, sometimes it is like frozen, sometimes it grows too fast (see cave G). Flies have tendency to group together in the free space. During the play everything suddenly slows down in the most inappropriate moments. Then accelerates, and slows down again... so, the player has hard times to control the pace. When standing under the stone or diamond, it is very hard to escape it running downward. Sometimes falling objects stop accidentaly for a moment, and continue to fall just when Rockford is on the collision course. It looks like the algorithm is a bit lousy.
Even though it was developed for Atari I would compare it to the "BD Collection" for Amiga where the playability is questionable.
This game is very annoying and I do not recommend it for somebody who is not patient enough. :)