I have just released new version of BBlocks which introduces some usability improvements. You will be now able to zoom in and out using simple pinch gesture.
Fully zoomed in
Fully zoomed out
As you can see from examples above, you can set any zoom level that you're comfortable with. Users with large screen devices (tablets) will benefit from larger workspace, whereas users with smaller screens will be able to select and position blocks with better precision.
I hope you're all happy with this update and as usual I welcome your feedback.