* The game doesn't use hardware scrolling and uses a reduced screen and heavily uses the invisible areas of both screens to store code and data.
* Map is 128 tiles wide and 18 tiles tall, but not all map space width is used. The remainder is garbage. In reality, Level 1,2,3 are 80 tiles wide. Level 4 is 112 tiles wide. * Each level has it's own palette of 16 colours. The palette for level 1 is at &87b3, level 2 is &87c3, level 3 is &87d3, level 4 is at &87e3. The palette is stored backwards with pen 15 first, down to 0.
== Video ==