Hi there! I really liked your game! We had a similar idea of blocking the AI path with obstacles and I'm really happy that I could try your game!
The only little problem I found is that once I placed the rocks, there was no way to remove them, neither clicking nor resetting the level (don't know if it's like this for all levels, it happened only in one of the levels with two vacuum cleaners).
Plus I don't know if it's intentional but some level could be solved in a different way and with less blocks that the one it looks it is supposed to be resolved, but maybe it's good that there are different solutions:
Anyway these are minor things, I had a lot of fun!! Great job!