It's interesting! The french keyboard layout definitely threw me off, but I got used to it after a little bit (since you mostly just need forward and back with a mouse). I also had a mysterious crash at some point which I don't know why.
I think I inherently enjoying 3D flying in games, so I enjoyed the feeling of playing this and just moving around, even though it's a little closer to a noclip mode than full on flight.
The main thing I think was that the combat wasn't super great feeling. I think there's a few things here: enemies don't have great hitreacts, so I couldn't tell if I was doing damage; it's difficult in 3D space to see how far ahead my hitbox is for light or heavy attacks, and there was no ranged option at all. Enemies have seemingly near instant hitscan projectiles - well, it's not instant else you would die in seconds, but it's close - and they all shoot with the same fairly repetitive timing. That said, when my heavy attack accidentally smacked a building and it exploded I cackled a bit; that was fun.
I really liked the idea of a magical girl just summoning massive tentacles for all her attacks and abilities. The special being a bunch of tentacles that envelop foes was a fun surprise, but given they still attacked anyway (and it wasn't like they moved around much) it didn't actually seem very useful.