Hi, this seems neat. Some points:

In Chrome 19.0.1084.52 on Ubuntu, I'm getting told to use Apple command key shortcuts.

There is no scrollbar. The scroll wheel works, but the site captures the middle mouse button (without using it?), so grab and drag (with the chromeTouch extension) doesn't work.

The little instruction sequences would make a lot more sense if they said what was happening. E.g. instead of "hold shift, click the text", "hold shift and click the text to frob the whatsit".

Grids and columns seem limited and too much work for aligning things. Check out what Inkscape can do.

There seem to be functions that are inaccessible if you don't know their keyboard shortcuts, or perhaps just not working for me, e.g. selecting multiple objects (not shift, control, or alt?!), making a group.