Use the arrow keys to move the placement target around. To rotate objects use Q and E. To place an object press A and to delete press D. If you want to completely clear the board, press W. To switch through backdrops use S and X. Now create a beautiful city!!(or an ugly one if you wish!)
Notes: 1.) PLEASE, do not place an object on top of another! it will reduce the amount of tiles you can place and probably reduce lag if you get any. 2.) It is possible to fill the entire screen with tiles.(just so that you know) 3.) I will be making updates so you can add more to your city's!