diff --git a/right_coin.lua b/right_coin.lua
index d434e47..0f5757f 100644
--- a/right_coin.lua
+++ b/right_coin.lua
@@ -4,31 +4,89 @@
 -- script: lua
 
 t=0
-x=96
-y=24
+w=240
+h=136
+GameState = { start=0, game=1, gameover=2, market=3 }
+currentState = GameState.start
+
+function drawStart()
+	cls(13)
+	print("The Right Coin",80,36)
+	print("Press Z to start",75,96)
+end
+
+function drawGameOver()
+	cls(1)
+	print("You died",80,36,6)
+	print("Press Z",75,96,15)
+end
+
+function drawGame()
+	cls(0)
+end
+
+function drawMarket()
+	s=8 -- sprite size
+	xOff=s*2
+	yOff=s*2
+	for i=xOff+s, w-(2*s)-xOff, s do
+		spr(64,i,yOff,0,1,0,1)
+		spr(64,i,h-s-yOff,0,1,0,1)
+	end
+	for j=yOff+s, h-(2*s)-xOff, s do
+		spr(64,xOff,j,0,1,0,0)
+		spr(64,w-s-xOff,j,0,1,0,0)
+	end
+	spr(65,xOff,yOff,0,1,0,1)
+	spr(65,w-8-xOff,yOff,0,1,0,2)
+	spr(65,w-8-xOff,h-8-yOff,0,1,0,3)
+	spr(65,xOff,h-8-yOff,0,1,0,0)
+end
+
+function draw(state)
+	if currentState == GameState.start then
+		drawStart()
+	elseif currentState == GameState.game then
+		drawGame()
+    elseif currentState == GameState.market then
+        drawMarket()
+	elseif currentState == GameState.gameover then
+		drawGameOver()
+	end
+end
+
+function update(state)
+	if currentState == GameState.start then
+		if btnp(4) then -- A (Z key)
+			currentState = GameState.game
+		end
+	elseif currentState == GameState.game then
+		if btnp(4) then -- A (Z key)
+			currentState = GameState.market
+		end
+		if btnp(5) then -- B (X key)
+			currentState = GameState.gameover
+		end
+	elseif currentState == GameState.market then
+		if btnp(4) then -- A (Z key)
+			currentState = GameState.game
+		end
+	elseif currentState == GameState.gameover then
+		if btnp(4) then -- A (Z key)
+			currentState = GameState.start
+		end
+	end
+end
 
 function TIC()
-
-	if btn(0) then y=y-1 end
-	if btn(1) then y=y+1 end
-	if btn(2) then x=x-1 end
-	if btn(3) then x=x+1 end
-
-	cls(13)
-	spr(1+t%60//30*2,x,y,14,3,0,0,2,2)
-	print("HELLO WORLD!",84,84)
+	update(currentState)
+	draw(currentState)
 	t=t+1
 end
 
 -- <TILES>
--- 001:efffffffff222222f8888888f8222222f8fffffff8ff0ffff8ff0ffff8ff0fff
--- 002:fffffeee2222ffee88880fee22280feefff80fff0ff80f0f0ff80f0f0ff80f0f
--- 003:efffffffff222222f8888888f8222222f8fffffff8fffffff8ff0ffff8ff0fff
--- 004:fffffeee2222ffee88880fee22280feefff80ffffff80f0f0ff80f0f0ff80f0f
--- 017:f8fffffff8888888f888f888f8888ffff8888888f2222222ff000fffefffffef
--- 018:fff800ff88880ffef8880fee88880fee88880fee2222ffee000ffeeeffffeeee
--- 019:f8fffffff8888888f888f888f8888ffff8888888f2222222ff000fffefffffef
--- 020:fff800ff88880ffef8880fee88880fee88880fee2222ffee000ffeeeffffeeee
+-- 064:03aaaa3003aaaa3003aa3a3003aaaa3003aaaa3003aaaa3003a3aa3003aaaa30
+-- 065:03aaaa3003aa3a3303aaaaaa03aaaaaa03aaaa3a033aaaaa0033333300000000
 -- </TILES>
 
 -- <WAVES>