Looks like in Screenshot 3 they are hugging, dancing, or doing something rather than fighting. (Sorry just had to put that out there, hehe). For a 2D game it doesn't look to bad, graphics and effects don't like to bad either. Making a larger level (since seeing the video only makes it look like it's very small not to wide, you should widen it up and make more less a full level out of it. Give the player room to adventure around a bit.

Making the game more interactive, maybe a 2-Player mode or even an online Multiplayer mode would really intensify the gameplay! On top of all that you have a good project going, could use it's improvements but nonetheless you have something to show! Good job, and good luck!