Great game!
It looks amazing visually, plus the weapons actually appear on the planes and it looks right.
I like how weapons also give their bonus to adjacent weapons, makes for great combos :)
Only thing I'd change is the plane's hitbox being HUGE, especially when compared to other shoot'em'up. I assume the plane is big so you can see the weapons better, but I'd add a colored part in the middle that's the "weakpoint" and ignore enemy shots elsewhere (like in a lot of shoot'em'up).
But overall, crazy good for such a short jam :)