Nice, shows a lot of promise. A quick feedback, placign the floating toolbar at the top is distracting and takes up real-state from the actual drawing. I'd prefer to have a regular toolbar or placing it at the bottom of the canvas.
Edit: or make it moveable/collapsible
Thanks, the toolbar has already been redesigned and moved several times. It collapses anyway when the window gets too narrow, so giving it a collapse button should be super easy to do.
Plus one on the floating thing, on desktop it'd be great to be able to move it out of my way but still have it present.
Also, while I assume/hope there are shortcut keys on desktop, I have no idea what there are and if they're documented anywhere I can't find it. If there aren't shortcut keys, it'd be super useful to add them, at least for common actions.