Great idea and very efficient at making you forget you're actually learning. However, there are way too many planes at the same time, even on easy level. Makes it overwhelming.
Wow, a game on newgrounds that is actually educational! I like it, especially the graphics, quotes, and info about war machines! However, I would suggest making the aircrafts go a little slower, or at least decrease the number of them on screen at one time, as it can be hard to do all those calculations in half a minute! Otherwise, great game!