The idea is amazing, never thought that I'd be playing a sokoban box. Alot of the puzzles also have interesting concepts to them, you gotta figure out where's the right place to position yourself to sneak up on the humans, I especially liked level 2 and 5!
My main complaint would be the gauging distance, which is not easy to predict and one mistake could set you back maybe minutes of gameplay. I think an alternative would be to click and hold on the square you want to go to, and then you must hold your mouse there some duration before you can slide into that square.