diff --git a/cart.odin b/cart.odin
index 2585d65..9ba3090 100644
--- a/cart.odin
+++ b/cart.odin
@@ -29,6 +29,7 @@ loadCart :: proc(target: ^Cart, filename: cstring) -> CartLoadError {
 		return CartLoadError.Wrong_Size
 	}
 	target.texture = rl.LoadTextureFromImage(target.image)
+	rl.SetTextureFilter(target.texture, .POINT)
 	target.loaded = true
 	return CartLoadError.None
 }
diff --git a/guimode.odin b/guimode.odin
index a848b7a..0d58e96 100644
--- a/guimode.odin
+++ b/guimode.odin
@@ -5,11 +5,12 @@ import rl "vendor:raylib"
 import "core:fmt"
 import "core:strings"
 import "core:slice"
+import "core:bytes"
 import "core:os"
 
 
-W :: 400
-H :: 300
+W :: 640
+H :: 480
 
 width : int = W
 height : int = H
@@ -23,17 +24,31 @@ fileNameBuffer : [FILENAME_MAX]byte
 fileNameString := cstring(&fileNameBuffer[0])
 editMode := false
 
+fileListScrolling : i32 = 0
+fileListActive : i32 = -1
+fileListFocus : i32 = -1
+
+fileList : rl.FilePathList
+
 
 State :: enum {
 	CartsInput,
 	Export,
 	GotError,
-	Exported
+	Exported,
+	FileSelect
 }
 
 GraphicsMode :: proc() {
+	files = slice.into_dynamic(filesBuf[:])
 	cart := Cart{}
 	target := Cart{}
+	fileListTarget : ^Cart
+
+	DefaultName :string : "output.p8.png"
+	for char, i in DefaultName {
+		fileNameBuffer[i] = auto_cast char
+	}
 
 	errorMessages := map[CartLoadError]cstring {
 		.None = "",
@@ -44,15 +59,15 @@ GraphicsMode :: proc() {
 	defer delete(errorMessages)
 	currentError := CartLoadError.None
 	
-	rl.SetConfigFlags({rl.ConfigFlag.WINDOW_RESIZABLE})
+	rl.SetConfigFlags({.WINDOW_RESIZABLE, .INTERLACED_HINT})
 	rl.InitWindow(W, H, "PicoRepico")
 	rl.SetTargetFPS(60)
 
 	//fontData := #load("font.ttf")
 	//font := rl.LoadFontFromMemory(".ttf", raw_data(fontData), auto_cast len(fontData), 8, nil, 0)
-	font := rl.LoadFontEx("font.ttf", 32, nil, 0)
-	rl.GuiSetFont(font)
-	rl.GuiSetStyle(auto_cast rl.GuiControl.DEFAULT, auto_cast rl.GuiControlProperty.BORDER_COLOR_NORMAL, i32(rl.ColorToInt(rl.Color{211, 2, 255, 255})))
+	//font := rl.LoadFontEx("font.ttf", 32, nil, 0)
+	//rl.GuiSetFont(font)
+	//rl.GuiSetStyle(auto_cast rl.GuiControl.DEFAULT, auto_cast rl.GuiControlProperty.BORDER_COLOR_NORMAL, i32(rl.ColorToInt(rl.Color{211, 2, 255, 255})))
 
 	hw : f32 = auto_cast width / 2
 	hh : f32 = auto_cast height / 2
@@ -67,7 +82,7 @@ GraphicsMode :: proc() {
 		hw = auto_cast width / 2
 		hh = auto_cast height / 2
 
-		#partial switch state {
+		switch state {
 		case .CartsInput: {
 			mouse := rl.GetMousePosition()
 			if rl.IsFileDropped() {
@@ -93,18 +108,24 @@ GraphicsMode :: proc() {
 				}
 			}
 
+			zoom = 1
+			if width >= 640 && height > 450 {
+				zoom = 2
+			}
+
 			buttonCartRect := rl.Rectangle{
-				x = hw - CART_WIDTH - 20,
+				x = hw - CART_WIDTH * f32(zoom) - 5,
 				y = 8,
-				width = CART_WIDTH,
-				height = CART_HEIGHT,
+				width = CART_WIDTH * f32(zoom),
+				height = CART_HEIGHT * f32(zoom),
 			}
 			buttonTargetRect := rl.Rectangle{
-				x = hw + 20,
+				x = hw + 5,
 				y = 8,
-				width = CART_WIDTH,
-				height = CART_HEIGHT,
+				width = CART_WIDTH * f32(zoom),
+				height = CART_HEIGHT * f32(zoom),
 			}
+			cartRect := rl.Rectangle{0, 0, CART_WIDTH, CART_HEIGHT}
 			convertButtonRect := rl.Rectangle{
 				x = hw - 40,
 				y = auto_cast height - 38,
@@ -114,20 +135,32 @@ GraphicsMode :: proc() {
 
 			rl.BeginDrawing()
 			rl.GuiDummyRec(rl.Rectangle{0, 0, auto_cast width, auto_cast height}, "")
-			rl.GuiButton(buttonCartRect, "Place here cart")
-			rl.GuiButton(buttonTargetRect, "Place here target")
 			
+			if rl.GuiButton(buttonCartRect, "Drag original\ncart here") {
+				fileListTarget = &cart
+				cd(".")
+				state = .FileSelect
+			}
 			if cart.loaded {
-				rl.DrawTexture(cart.texture, auto_cast buttonCartRect.x, auto_cast buttonCartRect.y, rl.WHITE)
+				rl.DrawTexturePro(cart.texture, cartRect, buttonCartRect, {0, 0}, 0, rl.WHITE)
+			}
+			if rl.GuiButton(buttonTargetRect, "Drag target\nshell here") {
+				fileListTarget = &target
+				cd(".")
+				state = .FileSelect
 			}
 			if target.loaded {
-				rl.DrawTexture(target.texture, auto_cast buttonTargetRect.x, auto_cast buttonTargetRect.y, rl.WHITE)
+				rl.DrawTexturePro(target.texture, cartRect, buttonTargetRect, {0, 0}, 0, rl.WHITE)
 			}
 			if !(cart.loaded && target.loaded) { rl.GuiDisable() }
 			if rl.GuiButton(convertButtonRect, "CONVERT!") {
 				state = .Export
 			}
 			rl.GuiEnable()
+
+			if rl.GuiLabelButton(rl.Rectangle{auto_cast width-60, auto_cast height-20, 60, 20}, "by Nefrace") {
+				rl.OpenURL("https://nefrace.itch.io")
+			}
 		}
 		case .Export: {
 			res := rl.GuiTextInputBox(rl.Rectangle{hw - 100, 60, 200, 100}, "Input filename for result", "", "ok;cancel", fileNameString, FILENAME_MAX, nil)
@@ -151,8 +184,35 @@ GraphicsMode :: proc() {
 				state = .CartsInput
 			}
 		}
-		}
+		case .FileSelect: {
+			rl.GuiPanel(rl.Rectangle{4, 4, auto_cast width - 8, auto_cast height - 8}, "Select a file")
+			if rl.GuiButton(rl.Rectangle{auto_cast width - 26, 8, 16, 16}, "#128#") {
+				state = .CartsInput
+			}
+			if rl.GuiButton(rl.Rectangle{8, 30, 50, 22}, "Open") {
+				if fileListActive == -1 {break}
+				if rl.DirectoryExists(files[fileListActive]) {
+					cd(files[fileListActive])
+					break
+				}
+				if rl.GetFileExtension(files[fileListActive]) != ".png" {
+					fmt.println("not a png")
+					break
+				}
+				currentError = loadCart(fileListTarget, files[fileListActive])
+				if currentError != .None {
+					state = .GotError
+				}
+				state = .CartsInput
 
+			}
+			if rl.GuiButton(rl.Rectangle{60, 30, 50, 22}, "Up") {
+				cd("..")
+			}
+			rl.GuiSetStyle(auto_cast rl.GuiControl.LISTVIEW, auto_cast rl.GuiControlProperty.TEXT_ALIGNMENT, auto_cast rl.GuiTextAlignment.TEXT_ALIGN_LEFT)
+			res := rl.GuiListViewEx(rl.Rectangle{8, 54, auto_cast width - 16, auto_cast height - 62}, filesPtr, auto_cast filesCount, &fileListScrolling, &fileListActive, &fileListFocus)
+		}
+		}
 		
 		rl.EndDrawing()
 	}
@@ -161,3 +221,41 @@ GraphicsMode :: proc() {
 	unloadCart(&target)
 }
 
+filesBuf : [1024*8]cstring
+files : [dynamic]cstring
+filesPtr : [^]cstring
+filesCount : i32 = 0
+
+cd :: proc(dir: cstring) -> (result: bool) {
+	result = rl.ChangeDirectory(dir)
+	rl.UnloadDirectoryFiles(fileList)
+	clear(&files)
+	fileList = rl.LoadDirectoryFiles(".")
+
+	for fname in fileList.paths[:fileList.count] {
+		if rl.DirectoryExists(fname) || rl.GetFileExtension(fname) == ".png" {
+			append(&files, fname)
+		}
+	}
+
+	slice.sort_by(files[:], proc(i,j:cstring) -> bool {
+		a := string(i)
+		b := string(j)
+		adir := rl.DirectoryExists(i)
+		bdir := rl.DirectoryExists(j)
+		if (adir && bdir) || (!adir && !bdir) {
+			return strings.compare(a, b) == -1
+		}
+		return adir && !bdir
+	})
+
+	filesPtr = raw_data(files)
+	filesCount = auto_cast len(files)
+
+
+//	slice.sort_by_cmp(fileList.paths[:fileList.count], strings.compare())
+	fileListScrolling = 0
+	fileListActive = -1
+	fileListFocus = -1
+	return
+}