Splendid concept!!! (Just realized I could move the character lol)
The Special Object Implementation of making the cards your bullets is really unique and interesting. A lot of ways this can be further be used for gameplay.
On the weaker sides of the game, the Presentation. You probably didn't have enough time to improve on it, but I really do think that with improved art and audio, the game can look and feel really good to play.
And of course, congrats on submitting a game. Looking forward for improvement of this game hopefully!