added touchscreen support

src/js/main.js

@@ -108,4 +108,16 @@
 		else if(e.key=='ArrowRight') inputs.right=true;
 	});
 
+	window.addEventListener('touchstart', e => {
+		let x=e.touches[0].clientX/window.innerWidth-.5;
+		let y=e.touches[0].clientY/window.innerHeight-.5;
+		const angle=((Math.atan2(x, y)+2*Math.PI)%(2*Math.PI))/Math.PI;
+
+		let inputs=currentInputs;
+		if(angle>.25 && angle <.75) inputs.right=true;
+		else if(angle>.75 && angle<1.25) inputs.up=true;
+		else if(angle>1.25 && angle<1.75) inputs.left=true;
+		else inputs.down=true;
+	});
+
 })();