Oh yes, the space game - didn't it have celebs of the time like Keith Chegwin on it? They had to jump onto hexagons whilst a shadowy alien thing jumped from the other side I think - sort of draughts with 2 pieces?
And yes, a bit like Crystal; Maze with crappier sets.
Crystal Maze set was pretty cool actually - it really existed in an aircraft hangar in North Weald, all that they changed was to put different games in each room - I speak as someone who actually was in it - that was my "15 minutes of fame" (or embarassment)!!!.