I spent today working on the weapons / projectiles for the game. There's going to be six different weapon systems available: the default slow machine gun, a much faster machine gun, a spread gun a la Contra, a plasma cannon, a homing missile launcher and deployable mines. To obtain them, you have to fly over special weapon crates that spawn at specific points in the level. If I get the AI right, I'm hoping a lot of the strategy of the game will centre around controlling weapon spawn points like Quake.
Additionally, I added trails to the jets and they're coloured coded to your team. I was doing it entirely for aesthetics but found it really helps with target identification, so I'm very pleased with the result.
Projectile / crate artwork is programmer art still being finalized. Tomorrow I'll implement the game rules.