diff --git a/demosplash/demosplash.s b/demosplash/demosplash.s
index 37e725bf..038c701b 100644
--- a/demosplash/demosplash.s
+++ b/demosplash/demosplash.s
@@ -6,6 +6,16 @@
 
 demosplash2019:
 
+	;=========================
+	; clear zp
+	;=========================
+	lda	#0
+	ldy	#128
+zp_clear_loop:
+	sta	$0,y
+	iny
+	bne	zp_clear_loop
+
 	;=========================
 	; set up sound
 	;=========================
diff --git a/demosplash/starbase_action.s b/demosplash/starbase_action.s
index e4e3ec67..3404714f 100644
--- a/demosplash/starbase_action.s
+++ b/demosplash/starbase_action.s
@@ -454,6 +454,7 @@ asstr_above:
 	lda	#10
 
 asstr_adjust_y:
+	and	#$fe
 	sta	ASTRONAUT_Y
 
 	jsr	recalc_walk_collision
diff --git a/demosplash/starbase_astronaut.s b/demosplash/starbase_astronaut.s
index 23427b7d..b4691325 100644
--- a/demosplash/starbase_astronaut.s
+++ b/demosplash/starbase_astronaut.s
@@ -574,8 +574,9 @@ finally_draw_him:
 	sta	XPOS
 
 	lda	ASTRONAUT_Y
-	sec
-	sbc	EARTH_OFFSET	; adjust for earthquakes
+	and	#$fe
+;	sec
+;	sbc	EARTH_OFFSET	; adjust for earthquakes
 	sta	YPOS
 
 	lda	DIRECTION
diff --git a/demosplash/zp.inc b/demosplash/zp.inc
index a8993772..f3d14bd8 100644
--- a/demosplash/zp.inc
+++ b/demosplash/zp.inc
@@ -146,6 +146,8 @@ BEAST_DEAD	= $CB		; 1
 VENT_OPEN	= $CC		; 2
 INTRO_REPEAT	= $CD		; INTRO
 
+ASTRONAUT_X	= $CC
+ASTRONAUT_Y	= $CD
 
 LASER_TEMP	= $CE		; 2+
 LEFT_SHOOT_TARGET = $CF		; ALL
@@ -264,10 +266,10 @@ DRAW_PAGE	=	$EE	; ALL
 OFFSET		=	$EF
 
 INTRO_LOOPL	=	$F0	; INTRO
-ASTRONAUT_X	=	$F0	; ALL
+;ASTRONAUT_X	=	$F0	; ALL
 
 INTRO_LOOPH	=	$F1	; INTRO
-ASTRONAUT_Y	=	$F1	; ALL
+;ASTRONAUT_Y	=	$F1	; ALL
 
 SPRITETEMP	=	$F2	; ALL
 XPOS		=	$F3	; ALL