diff --git a/duke/TODO b/duke/TODO
index 3fe5a33f..2e2061ee 100644
--- a/duke/TODO
+++ b/duke/TODO
@@ -6,11 +6,13 @@ fancier PC-style sounds
 
 movement:
 ~~~~~~~~~
-collision detection up (hit head on jump)
+* collision detection up (hit head on jump)
 * when land from jump, stop walking
-walking right into objects, stand back one more
-can keep walking in collision, just don't move
-enemies
+walking right into objects, stand back one more (maybe and to mask?)
+* can keep walking in collision, just don't move
+
+level1:
+~~~~~~~
 exit door, blue pillar, red key (all in basement?)
 
 
diff --git a/duke/maps/level1_map.png b/duke/maps/level1_map.png
index b1e3aab5..e5e10a8d 100644
Binary files a/duke/maps/level1_map.png and b/duke/maps/level1_map.png differ
diff --git a/duke/move_duke.s b/duke/move_duke.s
index aa1dfdde..4da6a378 100644
--- a/duke/move_duke.s
+++ b/duke/move_duke.s
@@ -3,11 +3,16 @@ DUKE_SPEED	=	$80
 
 YDEFAULT	=	20
 
+HARD_TILES	=	32	; start at 32
+
 	;=========================
 	; move duke
 	;=========================
 move_duke:
 
+	lda	#0
+	sta	SUPPRESS_WALK
+
 	jsr	duke_get_feet_location	; get location of feet
 
 	jsr	check_falling		; check for/handle falling
@@ -19,6 +24,9 @@ move_duke:
 	lda	DUKE_WALKING
 	beq	done_move_duke
 
+	lda	SUPPRESS_WALK
+	bne	done_move_duke
+
 	lda	DUKE_DIRECTION
 	bmi	move_left
 
@@ -94,10 +102,38 @@ done_move_duke:
 	;=========================
 	; duke collide
 	;=========================
-	; only check above head if jumping
 
 duke_collide:
 
+	;===================
+	; collide with head
+	;===================
+
+	; only check above head if jumping
+	lda	DUKE_JUMPING
+	beq	collide_left_right
+
+	lda	DUKE_FOOT_OFFSET
+	sec
+	sbc	#16			; above head is -2 rows
+	tax
+
+	lda	TILEMAP,X
+
+	; if tile# < HARD_TILES then we are fine
+	cmp	#HARD_TILES
+	bcc	collide_left_right		; blt
+
+	lda	#0
+	sta	DUKE_JUMPING
+	lda	#1
+	sta	DUKE_FALLING
+
+collide_left_right:
+	;===================
+	; collide left/right
+	;===================
+
 	lda	DUKE_DIRECTION
 	beq	done_duke_collide
 
@@ -106,34 +142,34 @@ duke_collide:
 check_right_collide:
 	lda	DUKE_FOOT_OFFSET
 	clc
-	adc	#1			; underfoot is on next row (+16)
+	adc	#1			; right is one to right
 
 	tax
 	lda	TILEMAP,X
 
-	; if tile# < 32 then we are fine
-	cmp	#32
+	; if tile# < HARD_TILES then we are fine
+	cmp	#HARD_TILES
 	bcc	done_duke_collide		; blt
 
-	lda	#0				;
-	sta	DUKE_WALKING
+	lda	#1				;
+	sta	SUPPRESS_WALK
 	jmp	done_duke_collide
 
 check_left_collide:
 
 	lda	DUKE_FOOT_OFFSET
 	sec
-	sbc	#1			; underfoot is on next row (+16)
+	sbc	#1			; left is one to left
 
 	tax
 	lda	TILEMAP,X
 
-	; if tile# < 32 then we are fine
-	cmp	#32
+	; if tile# < HARD_TILES then we are fine
+	cmp	#HARD_TILES
 	bcc	done_duke_collide	; blt
 
-	lda	#0				;
-	sta	DUKE_WALKING
+	lda	#1
+	sta	SUPPRESS_WALK
 	jmp	done_duke_collide
 
 done_duke_collide:
@@ -244,8 +280,8 @@ check_falling:
 	tax
 	lda	TILEMAP,X
 
-	; if tile# < 32 then we fall
-	cmp	#32
+	; if tile# < HARD_TILES then we fall
+	cmp	#HARD_TILES
 	bcs	feet_on_ground		; bge
 
 	;=======================
diff --git a/duke/zp.inc b/duke/zp.inc
index 8534f165..5335be76 100644
--- a/duke/zp.inc
+++ b/duke/zp.inc
@@ -110,6 +110,7 @@ UPDATE_STATUS		= $94
 DUKE_FALLING		= $95
 DUKE_SHOOTING		= $96
 KICK_UP_DUST		= $97
+SUPPRESS_WALK		= $98
 
 ; done game puzzle state