Great work, very polished.
I think there were some points where the guards lights did not work upon colliding with the intruders (I saw this happen when the intruders went past the guard but then the guard's light reached them when they turned on them but did not kill the intruders. Hard to catch a picture of that but it happen to me many times on level 4).
Despite this small issue, I had a lot of fun :) Thank you for making this game!