Repton 2 (1985)

Repton 2 follows the same basic 'Boulderdash' puzzle style gameplay as its predecessor, and also adds a few new features to freshen things up: meteors, which would fall from the sky and kill upon contact, skulls, static objects that would kill the player if they were careless enough to walk into it, and the fast-moving spirits which would journey around the map hugging walls and objects and veering to any left-angles they came across.