Hey hey ~
I think you accomplished the core mechanics very well! What the user needs to do is very clear and easy to follow.
I wish that the difficulty came from something other than the people moving out of the squares after you've already placed them. Maybe some people shuffled on conveyer belts and only appear on the screen sometimes, something like that to mix it up between the levels and give it a little more depth. Also, try to be mindful of spelling and capitalization mistakes as they really take away from the polished look of the game and I noticed a few.
That said, I had a lot of fun playing this game. I think that the graphics and music really worked well for the game's theme. I really liked the style you added through the person telling you what to do. Great job :)