The mouse control is really good! And the game looks nice too.
The graphics suffer a bit from it being surprisingly tricky to tell who is friend/foe. Perhaps deliberate. Yes I know you look at the insignia but it's quite hard to do that when there are several grey aircraft on the screen and they're all performing aerobatics! The aircraft in different colours / obviously different models are easier to pick apart.
For a web-based game, use of the right click is problematic. At least in my browser this frequently leads to the game window resizing or even the browser going back and losing all progress!!! Also it meant, even though I do not use the right-click to do so, that at the start of many levels, all the bombs get dropped immediately!! Could there not be a keyboard shortcut, as there is for reduce speed?
Playing in keyboard control mode is not a lot of fun. It says WASD but it's really just WS and space to shoot...I still need to use the right-click to bomb. Why?? Is there an alternative control for bomb?
Other comments: last level is quite tough to beat, but fair. If the enemy airship manage to depart intact, shouldn't the level end with defeat though, not you flying around aimlessly on an empty map? The "choose your reward" armory screen should probably not show up once you've already got the full set of upgrades - you get told to pick but there's nothing to choose from! And when you win the game, you just get a textual message saying you won the game, a non-upgradable upgrade screen, then the screen goes black.... couldn't we at least see some credits or something?