Not a bad effort...
This reminds me of the old "Sokoban" games (help the burglar get the bags of money by pushing them out to the exit one by one, so on, so on).
Because the toon has to move in a diagonal direction pretty much all of the time i would have a suggestion to improve gameplay:
Get your keypad and use 7, 9, 1 and 3 to move the character around instead of the arrow keys. It's a minor change to code for the better. It'll confuse a lot less players and it'll be something different from using the same old arrow keys to move around.