All the new art is gorgeous.
The little horses you can explode were a very nice touch. I hadn't noticed before that the AA turret enemies can kill your grenades mid throw, really cool.
Interesting idea with the airborne reinforcements in the new level, but maybe they should come accompanied by the gunship enemy for fire support if you don't want the player to shoot the transport helicopters down every time.
The vulcan completely overshadows the rotary cannon but man does it shred. The smartgun is kind of weird but it's comparable to the basic cannon so it's solid. The unguided rockets are right up my alley since I used the other missiles as unguided weapons anyway. The mortar enemy does its job of threatening you from behind cover with its fast projectiles.
The development log button fails to open x for me:
Amazing progress as always.