Ok, a new version is up. You'll get: mouse control in addition to keyboard control (press "esc" to get your cursor back), new leaderboard (time to finish the game), a warning will be displayed in the bottom right corner of the screen if the game isn't connected to Kongregate (sorry hayesmaker, don't know what happened...).
Any more ideas?
Hey guys, thanks for your comments.
We uploaded a new version who must fix the collision issues (bullet/skeleton).
Keep the ideas coming. And remember to rate our game if you like it!