Please use turbo mode to make this run faster. Going fullscreen will make this slightly slower, however the image will be larger. Light will be emitted from where your mouse cursor is and will be blocked by objects. You can press space to change objects and drag them to move them. If you go inside, you can add your own costumes to the "Objects" sprite (make sure they are white).
Thanks to @gtoal for making some optimizations in his remix. I know this isn't running at even 1 FPS, but it's the fastest I could make it.
