I've uploaded the second part of the gameplay series in which I go through two of the singleplayer levels and also explain how to inventor mode works and how to use it.
Those who follow the game on twitter might have already seen that I am testing a new "rocket block". The block is almost fully integrated in the game but I have to adjust the settings (like the force, which it generates) and also make sure that it fits well into the multiplayer.
I've also had a look at the new GUI system of Unity 4.6. It makes things so much easier and I plan to port the current UI to the new system and to add the missing parts. Unity 4.6 Beta 19 came out recently so I might already begin to port the UI in that version, as I do not know how long it will be until the final version. With the new GUI, I could also finish the multiplayer sandbox.
If you have any feedback, don't hesitate to write a comment below and if you haven't already, please support the game on Steam Greenlight.