Use ResEdit to open the "BOOM Levels" file. Open the "levels" resource to
access any of the 80 levels. Select a level to edit and change the time
and the background image. Enter the following characters to change that
feature.
X: Player one starting position
Y: Player two starting position
2: Destructible blocks
0: Space
1: Indesctructible blocks
3: Coins
A, B, C…: Various enemies