Riou, thanks! The gun was an easy idea to implement, I just wanted to keep it away from the original Super Mario style. But yes, the boss is supposed to be a challenge in the first level right now. The second level boss is too easy I believe.
Sourwhatup, thanks! Yeah it took me a very long time to put together this game from the original tutorial from kirupa. It got to the point where I am reverse engineering the original code to manipulate it to do what I want.
AlphaJmon, thanks!, I spent a lot of time on programming this game. Yes, with the higher area I can go as high as I want with the game. That was a feature I had to program in myself. My only limitation is the size of the background picture I pick for the levels. I plan on doing a multiroom castle in the future which would be like what you are talking about.