Now you can start creating your own levels. Mario maker style, uhmmm ohh well or maybe not as good yet. 

To build a level just enter the editor and check the instructions on the bottom of the screen. There is only 1 level slot at this point so if you enter test mode then it will overwrite the old version you had. You cannot share levels with others yet (unless you find the level file and send them to the other party). 

There are no level validations rules at the moment so you can go bananas and create 3 player tanks if you wish.