Played on keyboard. Fun little shmup, and holy hell I was not expecting the sheer wall of enemies right after the tutorial.
I enjoyed that the tutorial did force you to use the button for the thing being described. As someone else mentioned, it's a bit awkward on keyboard, with having to use Q/E/R/F/G in addition to WASD. I actually had more fun using a plane that only had a primary MG just so I could focus on movement/yaw + fire.
I'd like the yaw tilting to be snappier, but I get if the point is to not have that level of responsiveness.
The menus and UI outside of the gameplay are not very good. It's functional, but on my screen I could not read most of the text, and there's a lot of cart before the horse stuff. Plane customization is cool, but unless it has a gameplay effect, it shouldn't come up before every sortie. If it has a gameplay effect, that was also not communicated.
All that said, the actual gameplay is really good and solid. No notes there.