The models showcase section seems unfinished.
Beat this Atlantis level (Probably the first time I see a cutscene) and beat the boss, though it seems when I clicked this menu, I still shot from my gun.
Picked Physx I think that's called: Used the grenade launcher on the brick house and the game lagged a bit.
With the Moon level: Beat it by destroying the cannon, then lost because the game was still going: This got me stuck.
Also tried other levels like the Gravitron (Kinda got stuck in the ceiling) and the sewer boss.
The Etna boss was a bit harder for me.
Something that personally annoys me a bit is how the starting weapon on the left is the shotgun because I find the chaingun more convinient.
(Also because in a way, a chaingun contrasts the rocket launcher more by being a fast paced hitscan-ish weapon vs a slow projectile one, while the shotgun is still slow).
As of writing this, I'm playing story levels (If that's what they are) but not in a chronological order.
Also discovered that shift + S is 180 degree turn.
The fight with Nayla wasn't that hard.
In Serenity, I do use G to fly in third person, but somehow it feels a bit weird.
I think I played most levels and also saw a lot of /agdg/ cameos and art.
Also got to see my mech being repaired when using the repair item.
Managed to see lots of new stuff.