This was a very simple take on a platformer, the bricks are exactly the same as I used in 'The Bells' and all the levels were simply stored as 'bits' to save space
For each screen position in each level, there could be either a space or a brick and nothing else. There was a couple of extra bytes used for the start and end points of the baddies per level but that was about it.
This was pretty much the only way to squeeze all the levels into the very limited memory available