All core stuff - gameplay, visuals, controls, audio - is very polished and great. I didn't like a long stretch of absolute emptiness that follows the first 2 enemies if you dive down. Especially since it was followed by a barrage that appeared out of nowhere (to be honest I maybe had at least 3 seconds to react, but I'm, slow) and incinerated me. So, in total - level design is a bit flawed, at least in the beginning. Everything else is great though, definitely going to retry later.