-Enjoyment: It is very fun to move the objects to the other side and see what they become!
-Creativity: The 2 sided puzzles is an awesome idea and you should keep working on it!
-Presentation: The simple shape are is great with a nice color pallet~ If you keep working on it, some 2D lights and shadows would fit it well.
-Neat game indeed!! Please check out my non-creative entry when you can :D