By far the most fun and challenging demo to develop, Jump'N'Shoot is a bookmarklet that allows you to load a little spaceman into almost any page. Equipped with a laser blaster and a space suit, turn any webpage into a side-scrolling destruction fest by running across, jumping on, and shooting page elements.
Check it out! saberpeep.github.io/web-demos/jumpnshoot...
A bookmarklet is a bookmark that, when you click it, loads javascript code into whatever page you are on. Obviously some sites have blocked this functionality such as commerce and baking sites, as well as some random sites such as twitter, but most sites don't care and we can load and run fun javascript like this.
