--- a/Source/com/watabou/switchhook/scenes/TitleScene.hx
+++ b/Source/com/watabou/switchhook/scenes/TitleScene.hx
@@ -78,7 +78,7 @@
 	}
 
 	private function onVersion():Void {
-		Lib.getURL( new URLRequest( "https://twitter.com/watawatabou" ) );
+		// Web port: the link to the author's Twitter page is gone.
 	}
 
 	private function processStars( elapsed:Float ):Void {
--- a/Source/com/watabou/switchhook/sprites/ActorSprite.hx
+++ b/Source/com/watabou/switchhook/sprites/ActorSprite.hx
@@ -8,6 +8,7 @@
 import com.watabou.switchhook.ui.MapView;
 import com.watabou.switchhook.utils.Updater;
 import openfl.Assets;
+import openfl.utils.AssetType;
 import openfl.display.Bitmap;
 import openfl.geom.Point;
 import msignal.Signal.Signal0;
--- a/Source/com/watabou/switchhook/ui/AttackArea.hx
+++ b/Source/com/watabou/switchhook/ui/AttackArea.hx
@@ -4,7 +4,7 @@
 import com.watabou.switchhook.geography.HexMap;
 import openfl.Assets;
 import openfl.display.Shape;
-import openfl.display.Tilesheet;
+import com.watabou.switchhook.utils.Tilesheet;
 import openfl.geom.Point;
 
 class AttackArea extends Shape {
--- a/Source/com/watabou/switchhook/ui/HealthIndicator.hx
+++ b/Source/com/watabou/switchhook/ui/HealthIndicator.hx
@@ -4,7 +4,7 @@
 import com.watabou.switchhook.utils.Updater;
 import openfl.Assets;
 import openfl.display.Shape;
-import openfl.display.Tilesheet;
+import com.watabou.switchhook.utils.Tilesheet;
 import openfl.geom.Rectangle;
 
 class HealthIndicator extends View {
--- a/Source/com/watabou/switchhook/ui/MapView.hx
+++ b/Source/com/watabou/switchhook/ui/MapView.hx
@@ -11,7 +11,7 @@
 import openfl.Assets;
 import openfl.display.Graphics;
 import openfl.display.Sprite;
-import openfl.display.Tilesheet;
+import com.watabou.switchhook.utils.Tilesheet;
 import openfl.events.MouseEvent;
 import openfl.geom.Point;
 import openfl.geom.Rectangle;
--- a/Source/com/watabou/switchhook/utils/Tilesheet.hx
+++ b/Source/com/watabou/switchhook/utils/Tilesheet.hx
@@ -0,0 +1,46 @@
+package com.watabou.switchhook.utils;
+
+import openfl.display.BitmapData;
+import openfl.display.Graphics;
+import openfl.geom.Matrix;
+import openfl.geom.Point;
+import openfl.geom.Rectangle;
+
+/**
+ * Web port: stand-in for openfl.display.Tilesheet, which OpenFL 9 no longer has. It keeps the parts the game used
+ * (addTileRect and drawTiles with x, y, tile index triples) and draws every tile as a bitmap-filled rectangle.
+ */
+class Tilesheet {
+
+	private var bitmap	: BitmapData;
+	private var rects	: Array<Rectangle> = [];
+	private var centers	: Array<Point> = [];
+
+	public function new( bitmap:BitmapData ) {
+		this.bitmap = bitmap;
+	}
+
+	public function addTileRect( rect:Rectangle, ?centerPoint:Point ):Int {
+		rects.push( rect.clone() );
+		centers.push( centerPoint != null ? centerPoint.clone() : new Point( 0, 0 ) );
+		return rects.length - 1;
+	}
+
+	public function drawTiles( graphics:Graphics, tileData:Array<Float>, smooth:Bool = false ):Void {
+		var matrix = new Matrix();
+		var i = 0;
+		while (i + 2 < tileData.length) {
+			var index = Std.int( tileData[i + 2] );
+			var r = rects[index];
+			var c = centers[index];
+			var dx = tileData[i] - c.x;
+			var dy = tileData[i + 1] - c.y;
+			matrix.tx = dx - r.x;
+			matrix.ty = dy - r.y;
+			graphics.beginBitmapFill( bitmap, matrix, false, smooth );
+			graphics.drawRect( dx, dy, r.width, r.height );
+			graphics.endFill();
+			i += 3;
+		}
+	}
+}