Seeing as the developer's name, which matches the site username, is included on the menu when you start the game it is highly doubtful that it is stolen.
The bullets are supposed to move with the plane. That's the way it was in the origional. It's not a glitch or a bug; it must have been intentional because it takes extra code to put it in, not extra code to prevent it.
Doomed Heroes
Dude! You just completed the Doomed Heroes achievement in Monsters' Den: Book of Dread and won the Doomed Heroes badge and 30 points!
BUWAHAHAHAHAHAHA
Not bad. Good job on actually thinking for yourself and adding powerups and minibosses before everybody else. There are some problems with the scrolling bg though, and the way you have it a player can fly behind the miniboss without penalty.
I think being able to win cards in game kinda ruins the point of challenges. I think trading would do the same thing. It makes sense if the only way to earn cards, other than starter cards, is through challenges.
Not bad; you didn't just copy and paste from Kongregate's Shootorials, unlike most tutorials, it's actually kinda semi-useful, and I haven't seen this version of a how-to-move script so good job.
 "Kongai"){kind=icon}
 "River Raid"){kind=icon}
 "Monsters' Den: Book of Dread"){kind=icon}
 "Brute Wars 2"){kind=icon}
 "Telepath RPG Chapter 2"){kind=icon}
 "G-Virus: Episode I"){kind=icon}
 "Swimming 2"){kind=icon}
 "Alian Wars! Beta"){kind=icon}
 "Shootorial #6"){kind=icon}
 "shootorial splat"){kind=icon}
 "Shootorial #4"){kind=icon}
 "Run"){kind=icon}
 "Hunted Forever"){kind=icon}
 "Tutorial On Moveing Object"){kind=icon}
 "Khronos"){kind=icon}