diff --git a/conf.lua b/conf.lua
index c1dbb0a..aa708e6 100644
--- a/conf.lua
+++ b/conf.lua
@@ -2,4 +2,7 @@ function love.conf(t)
 	t.window.width = 900
 	t.window.height = 640
 	t.window.title = "CHROMA SOLSTICE"
+	t.window.resizable = true
+	t.window.minwidth = 700
+	t.window.minheight = 500
 end
\ No newline at end of file
diff --git a/entity.lua b/entity.lua
index 8a36a5b..681e83f 100644
--- a/entity.lua
+++ b/entity.lua
@@ -21,8 +21,10 @@ function Entity:initialize(t)
 
 	self.drawOffset = {x = 0, y = 0}
 	if self.size.w < 1 or self.size.h < 1 then
-		self.drawOffset.x = (drawScale * 16 * self.size.w) / 2
-		self.drawOffset.y = (drawScale * 16 * self.size.h) / 2
+		-- Small sprites (notably 10px switches) are drawn inside a 16px cell.
+		-- Offset by the leftover space, not by half their own size.
+		self.drawOffset.x = drawScale * (16 - self.spriteSize.w) / 2
+		self.drawOffset.y = drawScale * (16 - self.spriteSize.h) / 2
 	end
 end
 
@@ -157,7 +159,7 @@ function Entity:setSprite(sprite)
 end
 
 function Entity:sha()
-	return math.random(-worldSha, worldSha) * .5
+	return math.random(-worldSha, worldSha) * .125 * drawScale
 end
 
 function Entity:bump()
diff --git a/main.lua b/main.lua
index f3252a1..12d9044 100644
--- a/main.lua
+++ b/main.lua
@@ -25,10 +25,7 @@ function love.load()
 	gameWorld = World:new()
 	_initLevelEditor()
 
-	gameCanvas = love.graphics.newCanvas()
-	sideBarCanvas = love.graphics.newCanvas(sideBarBox.w, sideBarBox.h)
-	finalCanvas = love.graphics.newCanvas()
-
+	_initCanvases()
 
 	inputTimer = Timer.new()
 
@@ -141,12 +138,32 @@ function love.textinput(t)
 	editorTextHandler(response)
 end
 
+function love.resize(w, h)
+	_computeDimensions()
+	drawScale = width / gridWidth / 16
+	_initCanvases()
+end
+
 function _initDefaults()
 	--set filter
 	love.graphics.setDefaultFilter("linear", "nearest")
 	love.filesystem.createDirectory("rooms")
 	
-	--set global width / height variables
+	--set global width / height / sidebar variables
+	_computeDimensions()
+
+	--set randomseed
+	math.randomseed(os.time())
+
+	--font
+	font = love.graphics.newFont("font/LCD_Solid.ttf", 16)
+	love.graphics.setFont(font)
+end
+
+-- Derive the square play area (side = smaller window dimension) and the
+-- sidebar that fills the remaining horizontal space. Safe to call any time
+-- the window size changes.
+function _computeDimensions()
 	width = love.graphics.getWidth()
 	height = love.graphics.getHeight()
 	if width > height then
@@ -155,17 +172,16 @@ function _initDefaults()
 		height = width
 	end
 
-	--set randomseed
-	math.randomseed(os.time())
-
-	--font
-	font = love.graphics.newFont("font/LCD_Solid.ttf", 16)
-	love.graphics.setFont(font)
-
-	--sidebar
 	sideBarBox = {x = width, y = 0, w = love.graphics.getWidth() - width, h = height}
 end
 
+-- (Re)create the render targets at the current window size.
+function _initCanvases()
+	gameCanvas = love.graphics.newCanvas()
+	finalCanvas = love.graphics.newCanvas()
+	sideBarCanvas = love.graphics.newCanvas(math.max(1, sideBarBox.w), math.max(1, sideBarBox.h))
+end
+
 function _initGridVars()
 	gridWidth, gridHeight = 11, 11
 	drawScale = width / gridWidth / 16