Thanks, it's HTML with JavaScript - really JavaScript can do anything. I find it quick and easy to just throw stuff into JavaScript and make it happen. Ultimately there is a <canvas> element that allows drawing to it. And mouse event listeners so you can capture the mouse/touches. HTML/JavaScript it's a lot easier than engines for many things. Using libraries like ThreeJS and MatterJS you can even do physics and 3d.
ctx.drawImage( playerImage, x, y, w, h );