This was a neat and fun little game! Really liked the little laser for the player's cursor too!
One of the things I'd like to point out is the lack of clarity with regards to the goal. I went around knocking things over for the fun of it, not knowing it was actually tied to the goal of the game, until I didn't find anything else interesting, so in the end I had to just assume that I had to knock everything over to win.
Another thing is that I think it'd have been nice to pan the camera in the direction of where the player cursor is. Maybe it's due to a habit of mine from playing other top-down games, but I like moving the mouse to the edges of the screen to check whether there are any guards in that direction, and to plan out my route. But since that wasn't in this game, I had to brace myself while I tip-toe tile-by-tile to make sure I don't get caught by a random guard just off-screen.