This is a simulation of...well... Scratch itself! It doesn't always work that well, and you can't use as many blocks, but it works very similar to how it does in the real scratch application.Click on the cat to move it and change the variables and click on the sprites that look like part of scripts to add a script. Click on the delete scripts sprite to delete all of the scripts. Have fun! P.S. Please look at this project. You don't have to, but thanks if you do!http://scratch.mit.edu/projects/g8rghr/315345 Also, it lags a lot online, so you'll probably have to download it.