Implement more hotkeys for ease of use (using CHI standards)
* Copy, Paste, and Duplicate for modules within or between blocks.
* Delete with Delete key as well as the Backspace key.
* Put a Back arrow on the toolbar instead of using the big up arrow overlay.
These are all good suggestions. The first one was already on our issue tracker. The other two have now been added also and I'll notify you here when they are implemented.