I like the fusion of Restaurant/Tower Defense. It's funny and has a lot of creative potential. The early levels were fun, but level 7 is where the game starts showing problems. The kitchen is hard to navigate, and my character moves slow and gets stuck on corners a lot. As a result, it's way too easy to burn food, and it seemed like cooking only hot potatoes (because the center counter is so close to the fridge and the conveyer belt) was the best and only option. But even though that was the best strategy, it still wasn't enough to beat the level.
These customers wearing red shirts EAT the food (like completely, so that it disappears), and there's like, five of them. So no matter how much food I put in the restaurant, the red shirts eat all of my food and I lose. I'm not sure if it's even possible to win that level, it's way too difficult.
I would suggest having less red shirt customers, and give them a timer so that they only sometimes consume the food, not every single time.