We get a lot of people asking how to make their own simulations. Unfortunately, there’s no easy answer to this and we can’t respond to such questions. If you’re interested, we recommend searching the web for HTML5 or Flash tutorials.
Finally, please note that the simulations on this website are developed in our spare time and we offer them for free; so there can occasionally be a large gap between releases of simulations. Rest assured however that we are always working on new ones!
So, if there is still a issue, or you just want to mention something, contact us using twitter, facebook or Google+.