Thank you for playing! Unfortunately, I wasn't able to get everything working in time for the deadline, which is why everything is a bit confusing!
The idea is that you're a fighter pilot escorting squads of bomber planes. Each new wave of planes have a spy among them, which you have to shoot down before they start shooting down your allies. To spot them, you can look at their callsign which is shown at the bottom. Spy planes' callsigns end with two consonants, while allied planes end with a vowel and a consonant.
There's no losing condition implemented yet, but the idea was that you lose if you shoot down one of your allies. Other than that, just try to get a high score pretty much!
I'll try to make everything more complete tomorrow! :)