played through climax twice now, it's a 4/5 for me for a few minor reasons.
Controlling speed is annoying with touch controls, for an arcade game where you need to speed up and slow down at points it doesn't sit well with touch sliders.
The new sounds, the bombs are twice as loud as they need to be and whistle, the new rocket sound has a silent pause at the beginning so the rocket will sound like it's lagging behind your button presses, not good for keeping count of how many shots you just did in the heat of battle.
Climax works as normal but you have to stay in it for half a bar now, sometimes that feels a little too long.
Vulcan cannon is useless, you get no feedback hitting anything and it feels like you are shooting through stuff, taking down the stealth bomber is luck dependent.
At one point in the mountains the game stopped loading the scenery and I was flying around an empty space with enemies on screen.
The climax soundtrack does not loop! it plays, ends, starts again and feels really cheap. The classic soundtrack seems fine.
No voices outside of two areas telling you about the stealth bomber immune to rockets and the floodlights, that is it.
Not one single cut scene, you get ranked at the end with "ending c" or "ending a" but no scene plays out, just your fighter flying into unlimited space.