diff --git a/ootw/Makefile b/ootw/Makefile
index 43bc09c5..2b55df18 100644
--- a/ootw/Makefile
+++ b/ootw/Makefile
@@ -16,7 +16,7 @@ ootw.dsk:	HELLO LOADER INTRO OOTW_C1 OOTW_C2 OOTW_C3 OOTW_C4 OOTW_C5
 	$(DOS33) -y ootw.dsk BSAVE -a 0x1700 OOTW_C2
 	$(DOS33) -y ootw.dsk BSAVE -a 0x1700 OOTW_C3
 	$(DOS33) -y ootw.dsk BSAVE -a 0x1700 OOTW_C4
-#	$(DOS33) -y ootw.dsk BSAVE -a 0x1700 OOTW_C5
+	$(DOS33) -y ootw.dsk BSAVE -a 0x1700 OOTW_C5
 #	$(DOS33) -y ootw.dsk BSAVE -a 0x1700 AUDIO_TEST
 #	$(DOS33) -y ootw.dsk BSAVE -a 0x2000 COMPRESS-TEST
 
diff --git a/ootw/empty.dsk b/ootw/empty.dsk
index 0a2af35e..023c538b 100644
Binary files a/ootw/empty.dsk and b/ootw/empty.dsk differ
diff --git a/ootw/ootw_c5.s b/ootw/ootw_c5.s
index 255225b6..1e94e60e 100644
--- a/ootw/ootw_c5.s
+++ b/ootw/ootw_c5.s
@@ -95,12 +95,13 @@ end_message:
 .include "alien.s"
 
 
-;.include "gun.s"
-;.include "blast.s"
-;.include "shield.s"
+.include "gun.s"
+.include "laser.s"
+.include "blast.s"
+.include "shield.s"
 
-;.include "door.s"
-;.include "collision.s"
+.include "door.s"
+.include "collision.s"
 
 ; room backgrounds
 .include "ootw_graphics/l5cave/ootw_c5_cave.inc"
@@ -108,4 +109,3 @@ end_message:
 .include "ootw_graphics/sprites/physicist.inc"
 .include "ootw_graphics/sprites/alien.inc"
 
-
diff --git a/ootw/ootw_c5_cave.s b/ootw/ootw_c5_cave.s
index 0d4485f5..40368b33 100644
--- a/ootw/ootw_c5_cave.s
+++ b/ootw/ootw_c5_cave.s
@@ -72,7 +72,7 @@ falling_in:
 
 	jmp	cave_setup_done
 
-	; hallway with weird ceiling
+	; ????
 cave1:
 ;	cmp	#1
 ;	bne	cave2
@@ -106,6 +106,11 @@ cave_setup_done:
 	lda	#$c				; load to page $c00
 	jsr	load_rle_gr			; tail call
 
+	;=====================
+	; setup walk collision
+	jsr	recalc_walk_collision
+
+
 
 ootw_cave_already_set:
 	;===========================
@@ -395,3 +400,41 @@ large_rock:
 	.byte $AA,$A0,$00,$00,$02,$AA,$AA
 
 
+
+
+
+door_y:
+        c4_r0_door0_y:  .byte 24
+        c4_r0_door1_y:  .byte 24
+        c4_r0_door2_y:  .byte 24
+        c4_r0_door3_y:  .byte 24
+        c4_r0_door4_y:  .byte 24
+
+door_status:
+        c4_r0_door0_status:     .byte DOOR_STATUS_CLOSED
+        c4_r0_door1_status:     .byte DOOR_STATUS_CLOSED
+        c4_r0_door2_status:     .byte DOOR_STATUS_LOCKED
+        c4_r0_door3_status:     .byte DOOR_STATUS_LOCKED
+        c4_r0_door4_status:     .byte DOOR_STATUS_LOCKED
+
+door_x:
+        c4_r0_door0_x:  .byte 7
+        c4_r0_door1_x:  .byte 18
+        c4_r0_door2_x:  .byte 29
+        c4_r0_door3_x:  .byte 31
+        c4_r0_door4_x:  .byte 33
+
+door_xmin:
+        c4_r0_door0_xmin:       .byte 0         ; 7-4-5
+        c4_r0_door1_xmin:       .byte 11        ; 18-4-5
+        c4_r0_door2_xmin:       .byte 20        ; 29-4-5
+        c4_r0_door3_xmin:       .byte 22        ; 31-4-5
+        c4_r0_door4_xmin:       .byte 24        ; 33-4-5
+
+door_xmax:
+        c4_r0_door0_xmax:       .byte 11        ; 7+4
+        c4_r0_door1_xmax:       .byte 21        ; 18+4
+        c4_r0_door2_xmax:       .byte 33        ; don't care
+        c4_r0_door3_xmax:       .byte 35        ; don't care
+        c4_r0_door4_xmax:       .byte 37        ; don't care
+