Thank you very much for the comment. I've uploaded a new Windows build that has all of the necessary files. First time publishing one of these things... heh :)
Please let me know if the new build works for you.
It runs ^^ ( don't worry, for my first game I have had the same problem xD ), so about the game:
1) The menu is really cool with the music ( the music is really good, good work! )
2) The game is short, but the gameplay is cool ( it's a good idea to have write the information about the character in your game page, to know what is the situation as player ^^ ).
3) The background image of the menu and credits scene is really nice, good work too !
4) It's a cool 2D game, and it's a good start ^^ .