I played this game on stream: https://www.twitch.tv/videos/2873552263?t=01h06m45 (My VOD seems to have split into multiple videos, so part of it may be on the next video)
Overall, I had a lot of fun! I made it to wave 3 or 4 (I can't remember), and the challenge/difficulty was nice. I mainly had a lot of trouble controlling the plane due to the thrust, rotate clockwise/counter-clockwise control system. It would be nice to have an option where up means the aircraft tries to rotate and fly upwards etc, so it's easier to control. You could still have the gravity and inertia etc, but it would make controls easier for people that prefer it that way.
The graphics were beautiful; I liked the explosions with the smoke effect. The planes were also nicely created, and each wave had different planes.
In the later waves, the ships would fire slow missiles in the air (I think?) which killed me a few times. I don't know is this already exists, but having some AOE poof that takes some time to reach and hit would be interesting from the ships, like it fires a projectile, and after some time it explodes and you die if you're in the blast radius.