diff --git a/build.sh b/build.sh
index 9bc2dea..aba805a 100755
--- a/build.sh
+++ b/build.sh
@@ -20,5 +20,5 @@ cc -std=c89 -DDEBUG -Wall -Wno-unknown-pragmas -Wpedantic -Wshadow -Wextra -Werr
 # cc uxn.c emulator.c -std=c89 -Os -DNDEBUG -g0 -s -Wall -Wno-unknown-pragmas -L/usr/local/lib -lSDL2 -o bin/emulator
 
 # run
-./bin/assembler projects/software/left.usm bin/boot.rom
+./bin/assembler projects/examples/dev.controller.usm bin/boot.rom
 ./bin/emulator bin/boot.rom
diff --git a/projects/examples/dev.controller.usm b/projects/examples/dev.controller.usm
index ff149b8..43f045e 100644
--- a/projects/examples/dev.controller.usm
+++ b/projects/examples/dev.controller.usm
@@ -1,62 +1,57 @@
 ( Controller )
 
+%INCR2 { #0001 ADD2 }
+%DECR2 { #0001 SUB2 }
+%HALF2 { #0002 DIV2 }
+
 ;slime { color 1 }
 
 |0100 @RESET 
 	
 	( set origin )
-	~Screen.width #0002 DIV2 =Sprite.x 
-	~Screen.height #0002 DIV2 =Sprite.y
+	~Screen.width HALF2 =Sprite.x 
+	~Screen.height HALF2 =Sprite.y
 	,default_icn =Sprite.addr
 	#11 =Sprite.color
 	#0a =slime
 
 BRK
 
-|c000 @FRAME 
+@FRAME 
 	
+	~Controller.buttons #f0 AND #00 EQU BRK?
+
 	#0a =slime
+
 	( hold ctrl key to change slime color )
-	,no-ctrl ~Controller.buttons #0f AND #01 NEQ JMP2? POP2
-		#05 =slime
-	@no-ctrl
-	( hold alt key to change slime color )
-	,no-alt ~Controller.buttons #0f AND #02 NEQ JMP2? POP2
-		#0f =slime
-	@no-alt
+
+	~Controller.buttons #0f AND
+		DUP #01 NEQ ,$no-ctrl ROT JMP2? POP2 #05 =slime $no-ctrl
+		DUP #02 NEQ ,$no-alt ROT JMP2? POP2 #0f =slime $no-alt
+	POP
+
+	( clear ) #10 =Sprite.color
+
 	( detect movement )
-	,no-up ~Controller.buttons #f0 AND #10 NEQ JMP2? POP2
-		( clear ) #10 =Sprite.color
-		( move ) ~Sprite.y #0001 SUB2 =Sprite.y ,up_icn =Sprite.addr
-		( draw ) ,redraw JSR2 BRK
-	@no-up
-	,no-down ~Controller.buttons #f0 AND #20 NEQ JMP2? POP2
-		( clear ) #10 =Sprite.color
-		( move ) ~Sprite.y #0001 ADD2 =Sprite.y ,down_icn =Sprite.addr
-		( draw ) ,redraw JSR2 BRK
-	@no-down
-	,no-left ~Controller.buttons #f0 AND #40 NEQ JMP2? POP2
-		( clear ) #10 =Sprite.color
-		( move ) ~Sprite.x #0001 SUB2 =Sprite.x ,left_icn =Sprite.addr
-		( draw ) ,redraw JSR2 BRK
-	@no-left
-	,no-right ~Controller.buttons #f0 AND #80 NEQ JMP2? POP2
-		( clear ) #10 =Sprite.color
-		( move ) ~Sprite.x #0001 ADD2 =Sprite.x ,right_icn =Sprite.addr
-		( draw ) ,redraw JSR2 BRK
-	@no-right
+	~Controller.buttons #f0 AND
+		DUP #04 ROR #01 AND #01 NEQ ,$no-up ROT JMP2? POP2 
+			( move ) ~Sprite.y DECR2 =Sprite.y ,up_icn =Sprite.addr $no-up
+		DUP #05 ROR #01 AND #01 NEQ ,$no-down ROT JMP2? POP2 
+			( move ) ~Sprite.y INCR2 =Sprite.y ,down_icn =Sprite.addr $no-down
+		DUP #06 ROR #01 AND #01 NEQ ,$no-left ROT JMP2? POP2 
+			( move ) ~Sprite.x DECR2 =Sprite.x ,left_icn =Sprite.addr $no-left
+		DUP #07 ROR #01 AND #01 NEQ ,$no-right ROT JMP2? POP2 
+			( move ) ~Sprite.x INCR2 =Sprite.x ,right_icn =Sprite.addr $no-right
+	POP
 
-BRK
-
-@redraw
-	
 	( draw face )
 	#11 =Sprite.color
+
 	( draw slime )
 	,slime_icn =Sprite.addr
 	~slime =Sprite.color
 
-RTN
+BRK
 
 @default_icn [ 3c7e ffdb ffe7 7e3c ]
 @up_icn      [ 2466 e7db ffff 7e3c ]
@@ -67,6 +62,7 @@ RTN
 
 |d000 @ERROR BRK 
 
+|FF00 ;Console { pad 8 char 1 byte 1 short 2 }
 |FF10 ;Screen { width 2 height 2 pad 4 y 2 x 2 color 1 }
 |FF20 ;Sprite { pad 8 x 2 y 2 addr 2 color 1 }
 |FF30 ;Controller { buttons 1 }