Thanks for the high praise! :) An additional secret with the images is that I screenshotted them, pasted and cropped in Paint, scaled them down 4x, then scaled them back up 4x, so that they'd be blurred a bit and it wouldn't have to take any more CPU time to do anti-aliasing at runtime. XD I uploaded a new version today that by default renders at 1280x720 and scales up to fullscreen, instead of rendering at full resolution, but it's still pretty slow. It did fix some key response issues, though. I have an algorithm idea for how to render much faster, but I need to work out a bunch of edge cases first.
