I tested and fixed everything, and now it works. Yes I test sometimes.

uCompat/Canvas.lua

@@ -133,7 +133,7 @@ function Canvas.newGradientRect(x1, y1, x2, y2, color1, color2, color3, color4)
 	return o
 end
 
-function Canvas.newText(x1, y1 text, color)
+function Canvas.newText(x1, y1, text, color)
 	local o = attrTable()
 	o.type = TYPE_TEXT
 	o[ATTR_X1] = x1
@@ -212,7 +212,7 @@ function Canvas.setAttr(object, attrName, attrValue)
 end
 
 function Canvas.getAttr(object, attrName)
-	return obect[attrName]
+	return object[attrName]
 end
 
 function Canvas.setObjOnTop(canvas, object)

uCompat/Sound.lua

@@ -9,6 +9,17 @@ PLAY_LOOP = 1
 
 -- Module
 
+-- Sound banks
+
+function Sound.loadBank(filename)
+
+end
+
+function Sound.unloadBank()
+
+end
+
+-- Mods
 function Sound.loadMod(id)
 
 end
@@ -25,6 +36,10 @@ function Sound.pause()
 
 end
 
+function Sound.resume()
+
+end
+
 function Sound.stop()
 
 end
@@ -56,3 +71,45 @@ end
 function Sound.setModPitch(pitch)
 
 end
+
+-- SFX
+
+function Sound.loadSFX(id)
+
+end
+
+function Sound.unloadSFX(id)
+
+end
+
+function Sound.startSFX(id)
+	return {"I am a SFX handle"}
+end
+
+function Sound.stopSFX(handle)
+
+end
+
+function Sound.releaseSFX(handle)
+
+end
+
+function Sound.stopAllSFX()
+
+end
+
+function Sound.setSFXVolume(handle, volume)
+
+end
+
+function Sound.setSFXPanning(handle, panning)
+
+end
+
+function Sound.setSFXPitch(handle, pitch)
+
+end
+
+function Sound.setSFXScalePitch(handle, scale)
+
+end

uCompat/dsUser.lua

@@ -67,7 +67,7 @@ function dsUser.getAlarmMinute()
 end
 
 function dsUser.getLanguage()
-	return language5[cgfu.getLanguage()]
+	return language5[cfgu.getLanguage()]
 end
 
 function dsUser.getGBAScreen()

uCompat/init.lua

@@ -16,6 +16,11 @@ ULUA_LIBS = (ULUA_DIR.."libs/")
 ULUA_BOOT_FILE = "main.lua"
 ULUA_BOOT_FULLPATH = (ULUA_DIR..ULUA_BOOT_FILE)
 
+-- Some old Lua functions
+function table.getn(t)
+	return #t
+end
+
 -- Other libs
 require("uCompat.screen")
 require("uCompat.Color")
@@ -35,4 +40,4 @@ require("uCompat.dsUser")
 require("uCompat.System")
 require("uCompat.ini")
 require("uCompat.Wifi")
-reqiore("uCompat.Nifi")
+require("uCompat.Nifi")

uCompat/screen.lua

@@ -124,12 +124,14 @@ function screen.print(scr, x, y, text, color)
 end
 
 function screen.printFont(scr, x, y, text, color, font)
-	checkBuffer(scr)[#videoStack[scr]+1] = {"text", {offsetX+x, offsetY+y, text, 8, RGB2RGBA(color), font}}
+	checkBuffer(scr)[#videoStack[scr]+1] = {"text", {offsetX+x, offsetY+y, text, 8, RGB2RGBA(color), nil}}
 end
 
 function screen.blit(scr, x, y, img, sx, sy, w, h)
+	local x = math.floor(x) -- \ Compatibility patch for some homebrews not using integers
+	local y = math.floor(y) -- /
 	local sizex, sizey = img.texture:getSize()
-	checkBuffer(scr)[#videoStack[scr]+1] = {"img", img.texture, {offsetX+x, offsetY+y, (sx or 0), (sy or 0), (w or sizex), (h or sizey), img.rotation}}
+	checkBuffer(scr)[#videoStack[scr]+1] = {"img", img.texture, {offsetX+x+math.floor(sizex/2), offsetY+y+math.floor(sizey/2), (sx or 0), (sy or 0), (w or sizex), (h or sizey), img.rotation}}
 end
 
 function screen.drawPoint(scr, x, y, color)
@@ -191,15 +193,13 @@ function screen.startDrawing2D() -- unused
 	-- As you can change the screen size, we have to re-calculate this every time.
 	offsetX = math.floor((gfx.BOTTOM_WIDTH-SCREEN_WIDTH)/2)
 	offsetY = math.floor((gfx.BOTTOM_HEIGHT-SCREEN_HEIGHT)/2)
-	if drawScreen == gfx.GFX_TOP then
+	if drawScreen == gfx.TOP then
 		offsetX = offsetX + 40
 	end
 end
 
 function screen.endDrawing()
-	gfx.startFrame(drawScreen)
-	--gfx.text(2, 2, "x: "..offsetX.." ;y: "..offsetY.." ;stackUP: "..#videoStack[0].." ;stackDOWN: "..#videoStack[1]) -- debug only
-	--gfx.text(2, 12, "screen: "..drawScreen.." ; stack: "..#videoStack[drawScreen]) -- debug only
+	gfx.start(drawScreen)
 	for i=1, #videoStack[drawScreen] do
 		local e = videoStack[drawScreen][i]
 		if e[1] == "img" then
@@ -210,7 +210,20 @@ function screen.endDrawing()
 			gfx[e[1]](table.unpack(e[2]))
 		end
 	end
-	gfx.endFrame()
+	
+	if offsetY ~= 0 then
+		gfx.rectangle(0, 0, 400, offsetY, 0, color.getBackground())
+		gfx.rectangle(0, SCREEN_HEIGHT+offsetY, 400, offsetY, 0, color.getBackground())
+	end
+	if offsetX ~= 0 then
+		gfx.rectangle(0, 0, offsetX, 240, 0, color.getBackground())
+		gfx.rectangle(offsetX+SCREEN_WIDTH, 0, offsetX, 240, 0, color.getBackground())
+	end
+	if drawScreen == gfx.TOP then
+		gfx.text(380, 225, tostring(gfx.getFPS()))
+	end
+	
+	gfx.stop()
 	
 	-- set the screen
 	drawScreen = ((drawScreen == 0 and 1) or 0)