The controls in shoot-em-ups are usually incredibly precise, but your ship was a bit slippery. I did like the presentation though, and the concept was pretty interesting.
Viewing post in Nirengeki: Double Strike jam comments
The slipperiness was meant to be accurate to how an object might actually move in space. I agree that it didn't fit well with the rest of the game, and goes against genre conventions.
I'm glad you liked the presentation! We took a lot of pride in the work we did to make the game look and sound as good as possible. I hope you had fun! And thank you for your feedback!