I agree, nothing is stopping you to change that though ;-) Though, I've been looking through Calypso a bit (the window browser) and for me it seems really diff

I agree, nothing is stopping you to change that though ;-) Though, I've been looking through Calypso a bit (the window browser) and for me it seems really difficult to add anything at the moment. If it gets any easier, I'll create some tutorials. Loading in your own code to append to an image is doable via a .bashrc style mechanism. As in, you put your code in a file, open a playground and load it in, and your image is appended.