A very nice and rather challenging old-fashioned game. Also great idea of releasing the sources, which one can be inspired by to learn how to program with Allegro.

A lot of the improvements needed are just fine-tweaking. Some planes are flying backwards, the explosions are a bit much, it's very hard, and the controls feel unresponsive. Really cool level design though!

I like old school graphics and sounds. The idea of the game is simple - control the plane and shoot your enemies. Easy steering, great fun. The only weird thing is that you can crash your plane by hitting a boat.