This is still in development so design and functionality of the Browse page will be changed in time.
When creating all you have to do it click the block in the block list (in the middle of the page) and it will be added to your selected blocks on the left, these can be dragged to reposition or dragged into the delete box which will free up one space (Blocks limited to 5 selected).
The site can be accessed here > http://mcpalette.somee.com/
Please post issues, bugs, suggestions and thoughts below so I can improve it.
Thanks and hope you get some use out of it.