The idea is really unique and I feel like it could be turned into a great full game! However it was a bit buggy for me, I couldn't click the abilities a lot of times, or I tried to place them and it didn't work.. or maybe I just didn't understand how to play?
One idea I had to make it more exciting is to shorten the timer. Maybe each NPC solves one task and after that, they win? And your job is to stop them?
I liked that there is voice acting btw :D