I enjoyed it - it's a solid tower defence and your two twists were nicely implemented. At the start of the game I saved money so I could react to the director's next plan, it was a nice balancing act. My castle became more and more powerful and by the end of the game I saturated each ring with bomb towers and swarm towers, it'd be good to alter the game somehow so it retains that uniqueness that it has at the start of a run.
I liked reading your plans for the next step of the director too, I'd love to see it in practice and hear of any weird quirks you found while implementing it.