Extra Continues:
When you are on the last life of your last continue, hit Start to pause and choose to return to the Batcave. Resume playing, and when you lose your last life, your continues will be refilled.

Level Codes:
R=red square
G=green triangle
B=blue set
.=empty field

Level 2:
RR.G
G.R.
B...
.RRG

 

Level 3:
GR.R
..BR
....
B.RG

 

Level 4:
RG..
..RR
B.G.
GR.G

 

Level 5:
.RR.
..BG
GRGR
RRRG

 

Level 6:
.BR.
.BBG
GRGR
GRB.