I liked how you have to think quickly when building where to put which type of barricade. I also liked that the game shows how many enemies are coming from which side.
Good job.
It is cool game idea.
It would be good to add something that triggers wave naturally (make the building time limited) or some ending of game.
Otherwise it was good game and I know that it's impossible to make perfect game in only a week.
GOOD JOB
I loved that there were cats and I liked the cute grafics.