diff --git a/defs.jor b/defs.jor
index f3dcda1..d753419 100755
--- a/defs.jor
+++ b/defs.jor
@@ -65,7 +65,17 @@
 : max ( x y -- x|y ) 2dup < if swap then drop ;
 
 : +!pos ( n var -- ) dup @ <rot + 0 max swap ! ;
+: cycle! ( lim var -- )
+  >r dup r@ @ <= if
+    drop 0 r@ !
+  else r@ @ 0 < if
+    r@ !
+  else drop then then rdrop ;
 
+: +!cycle ( n var lim -- )
+  >r >r r@ +! <r <r swap cycle! ;
+
+  over > if drop 0 else dup 0 <
 : checkpoint ( cp -- )
   create here 4 cells + , latest , tasks , ,
   does> dup @ here!
diff --git a/game.exe b/game.exe
index dd98a25..dab2edd 100755
Binary files a/game.exe and b/game.exe differ
diff --git a/game.prj b/game.prj
index 9f925f2..767e713 100755
Binary files a/game.prj and b/game.prj differ
diff --git a/jiles.jor b/jiles.jor
index e8c17ef..4dfe8b3 100755
--- a/jiles.jor
+++ b/jiles.jor
@@ -17,29 +17,46 @@ input.jor loadfile
 var color
 var spriteindex
 
-8 spriteindex !
-2 color !
+var refresh-needed
+: refresh 1 refresh-needed ! ;
 
+: color! dup color @ = if drop else color ! refresh then ;
+: +sprite! spriteindex spritecount +!cycle refresh ;
 
-: refresh
-  mousehide spriteindex @ drawfatsprite mouseshow ;
+: draw-palette 0 0x11 for i 79 i 3 << drawfatbox next ;
 
 : mousepos>sprpos 3 >> swap 3 >> swap ;
 : mousexys mousepos mousepos>sprpos spriteindex @ ;
 : tick
-  MOUSEL mousedown if
-    mousexys getpixel color @ != if
-      color @ mousexys putpixel
-      refresh
+  mousepos 128 < swap 128 < and if
+    MOUSEL mousedown if
+      mousexys getpixel color @ != if
+	color @ mousexys putpixel
+	refresh
+      then
+    then
+    MOUSER clicked if
+      mousexys getpixel color!
     then
   then
-  MOUSER clicked if
-    mousexys getpixel color !
+  mousepos 136 < swap 312 >= and if
+    mousepos swap drop 3 >>
+    MOUSEL mousedown if color! else drop then
   then
+  ^LEFT key-pressed if -1 +sprite! then
+  ^RIGHT key-pressed if 1 +sprite! then
   tick-debounce
-  ;
+;
 
-: draw ;
+: draw
+  refresh-needed @ if
+    mousehide
+    spriteindex @ drawfatsprite
+    color @ 78 0 drawfatbox
+    draw-palette
+    mouseshow
+    0 refresh-needed !
+  then ;
 
 mouseshow
 refresh
diff --git a/testbed.c b/testbed.c
index a4404df..d20731e 100755
--- a/testbed.c
+++ b/testbed.c
@@ -265,60 +265,71 @@ void f_glitch() {
 
 /* JILES */
 #define SCREEN_STRIDE 40
-void f_mousehide() {
-  mouse_hide();
-}
-void f_mouseshow() {
-  setLogicalWidth(SCREEN_STRIDE >> 1);
-  mouse_show();
-}
 
-int getpixel(int x, int y, unsigned int far *spr) {
+int getsprpixel(int x, int y, unsigned int far *spr) {
   int shift = (15 - x);
   int b = (spr[y +  0] & (1 << shift)) >> shift;
   int g = (spr[y + 16] & (1 << shift)) >> shift;
   int r = (spr[y + 32] & (1 << shift)) >> shift;
   int i = (spr[y + 48] & (1 << shift)) >> shift;
-  return b | (g << 1) | (r << 2) | (i << 3);
+  int v = (spr[y + 64] & (1 << shift)) ? 0 : 1;
+  return b | (g << 1) | (r << 2) | (i << 3) | (v << 4);
+}
+int resetEnabledCache = 0;
+
+#define setResetEnabledCached(m) \
+  if (resetEnabledCache != m) { \
+    resetEnabledCache = m; \
+    setResetEnabled(m); \
+  }
+
+void drawFatBox(int x, int y, int color) {
+  int faty;
+  int fill1 = color <= 0x0f ? 0xff : 0x55;
+  int fill2 = fill1 == 0xff ? 0xff : 0xaa;
+  unsigned int dst = SCREEN_STRIDE * y;
+
+  if (color > 0x0f) {
+    setResetEnabledCached(0);
+  } else {
+    setResetEnabledCached(0x0f);
+    setResetMask(color);
+  }
+  for ( faty = 0; faty < 8; faty ++) {
+    VID[dst + x + (SCREEN_STRIDE * faty)] = (faty % 2) ? fill1 : fill2;
+  }
 }
 
 void f_drawfatsprite() {
   int isprite = TOP().i;
-  unsigned int dst = 0;
   unsigned int far *spr = &sprites[isprite * SPRITE_STRIDE];
-  int x, y, faty, resetEnabled;
+  int x, y;
 
   DROP(1);
-  setWriteMode(0);
-  setAllPlanes();
-  setResetEnabled(0x0f);
-  resetEnabled = 1;
   for ( y = 0; y < 16; y ++ ) {
     for ( x = 0; x < 16; x ++ ) {
-      int color = getpixel(x, y, spr);
-      int fill1 = color & 0x10 ? 0xff : 0x55;
-      int fill2 = fill1 == 0xff ? 0xff : 0xaa;
-
-      if (color >= 0x0f) {
-	if (resetEnabled) {
-	  setResetEnabled(0);
-	  resetEnabled = 0;
-	}
-      } else {
-	if (!resetEnabled) {
-	  setResetEnabled(0x0f);
-	  resetEnabled = 1;
-	}
-	setResetMask(color);
-      }
-      for ( faty = 0; faty < 8; faty ++) {
-	VID[dst + x + (SCREEN_STRIDE * faty)] = (faty % 2) ? fill1 : fill2;
-      }
+      int color = getsprpixel(x, y, spr);
+      drawFatBox(x, y << 3, color);
     }
-    dst += (SCREEN_STRIDE * 8);
   }
 }
 
+void f_drawfatbox() {
+  drawFatBox(ST1().i, TOP().i, ST2().i);
+  DROP(3);
+}
+
+void f_mousehide() {
+  mouse_hide();
+}
+void f_mouseshow() {
+  setLogicalWidth(SCREEN_STRIDE >> 1);
+  setResetEnabledCached(0);
+  setWriteMode(0);
+  setAllPlanes();
+  mouse_show();
+}
+
 void f_putpixel() {
   int isprite = TOP().i;
   unsigned int far *spr = &sprites[isprite * SPRITE_STRIDE];
@@ -351,7 +362,11 @@ void f_getpixel() {
   int y = ST1().i;
   DROP(2);
 
-  TOP().i = getpixel(x, y, spr);
+  TOP().i = getsprpixel(x, y, spr);
+}
+
+void f_spritecount() {
+  PUSHI(NUM_SPRITES);
 }
 
 /* INIT */
@@ -383,8 +398,10 @@ void game_f_init(char *exe, char *bootjor) {
   CDEF("mouseshow", f_mouseshow);
   CDEF("mousehide", f_mousehide);
   CDEF("drawfatsprite", f_drawfatsprite);
+  CDEF("drawfatbox", f_drawfatbox);
   CDEF("putpixel", f_putpixel);
   CDEF("getpixel", f_getpixel);
+  CDEF("spritecount", f_spritecount);
 
   f_loadjor(bootjor);