Really nice game! It has a nice feel to it. The only thing I would had would be a killer sound track like the one in Contra 3 (SNES).
Regarding your game, my team and I were wondering if you would allow us to use it in our Arcade Cabinets. We currently build retro gaming arcade cabinets and take the opportunity to show games like yours in them. Also do you have a website that shows all your content?