good for a first...
here are a few things i noticed that could make the game more enjoyable.
1. you should fix the dialouge. i mean come on, "Captain Polygraph"?
2. the intro animation and art style was really good for a first, but the actual gameplay animation wasn't that great.
3. you should add more features to the actual gameplay, to make it more interesting. it seemed to me like an advanced version of defend your castle.
all in all, i give it a 4. good job