Great little game. I couldn't complete it though as I kept dying. Is there any indication of your health? I couldn't see anything.
I really like the art style on this, and Gary's happy little face, I guess he's happy because he doesn't have to go to work anymore!
The music is nice and relaxing too, and the sound effects are good as well.
I like how the devils will follow you then stop when you get a certain distance away from them, that's good.
And I also like how the bazooka has 360 rotation, so you can shoot while running away like a coward, which I was doing frequently.
I think I found a bug, you can fire once, then you can't fire again until the net has disappeared, but then after that you can repeatedly fire as quick as you can press the mouse button.
Overall great job, especially as its the first game you've made, great work.
Oh, and the title screen is good too, with Gary's surprised spirit seeing his own body.