One of the most important features has been added today: level sharing! Players can now share or download level files (.json format).
I will eventually add an option to share and manage levels online. In Boxel Rebound, levels were uploaded to a server without any relation to the creator. At the time, this was the easiest solution, but it prevented people from gaining reputation. The proper way would be to associate an account with each level, and allow the user to manage their own levels (edit, delete, promote etc.)
While I work on an online solution, enjoy the wonders of manually sending files LOL.