Dynamic World Creator and Shoot the Robot Game

After scratching my head for the past few days with Havok Physics and aggregates, finally got my demo project working.
So far, it’s a ‘dynamic’ world builder with sentry robots you can shoot. Shoot with the space bar. You can only shoot staionary robots at the moment.
Navigation is via mouse scroll or screen pointer on the floor.
You can change the building design, by pressing ‘e’ and using the arrow keys to move around a large 3d cursor. You can then use < and > to change the underlying cell, finally pressing ‘f’ when complete.
I’m now going to make the robots shoot back, and also have some objects to find.
Demo at https://ukcpg.co.uk/scripts/dynamic.php