±± = wall
²² = wall with decoration. sign, banner, picture, etc.
ÛÛ = elevator walls or entrance elevator
ðð = locked door
®¯ = elevator door
 o = object; table, lamp, well, bed, skeleton...etc.
 a = ammunition
 f = food
 + = first aid
 t = treasure
 s = sphere
 g = machine gun
 c = The Big Gun!!!
yk, bk = yellow key; blue key
 * = starting position
 ? = secret passage
 x = dead guard
- and ][ = doors

G1,G3,G4 = Guards (levels 1,3,4)
B1,B3,B4 = Blue Officers
D1,D2,D3 = Dogs
W1,W3,W4 = White S.S. Officers
R1,R3,R4 = Robot Guards; the green ones from episode 2
P = Pacman ghosts
V = Floating Vampire Hitler
M = The Big Guy