Not too bad for a first.
It's not too bad for a first flash, I would recommend avoiding MS Paint style graphics next time. Also, the idea appeals me, interactive pistol, why not after all, it could be fun if you elaborated this more. A gadget involving a weapon that isn't in a game would be original and a good timekiller. If you want to push it further, do more weapons - and of course, leave the players free to do what they want instead of following steps then make the "try again" screen pop up. Anyway, that was a good attempt, it gets my 2. I hope you will improve yourself soon. =)