Really good.....could be better
It's pretty obvious you were trying to make an updated (albeit very kooky) version of the classic IBM game "Sopwith". That's a very good game and I'm really glad to play an updated version of it. However, here are my gripes:
1. the control scheme kinda sucks....no wait it REALLY sucks. Even when you have the plane flying in the other direction (right-to-left as opposed to left-to-right) the controls don't invert in kind. you still have the left arrow to slow down, the right arrow to speed up, etc.
This is VERY disorienting in the middle of some of those high-speed dog-fights you have us going through. I think you should have the control scheme of Sopwith (i.e. right and left arrows to climb and dive depending on the direction you're flying in, up and down arrows to flip the plane up-side down. Ctrl and space would control the weapons and my own personal adjustment, make the two shift keys or two similarly placed buttons control the plane's speed.....or just give us the option to configure our own damned controls. ;)
2. This game needs sound...One of the things I really liked about Sopwith was that PC speaker rendition of "Off we go (into the Wild Blue Yonder)" whenever you crashed....even if you just have an Mp3 playing in the background it would be a big improvement....come to think of it....I'll play my own damned Mp3's. Never mind... ;) You could throw in some sound effects, though.
All in all, good game...continue improving it.