Thank you for playing!
The delay you felt is probably the acceleration implementation on the movement to avoid hard turns, you can surpass it by making a fast small jump to the other direction. And I've had this jump issue early in the project but I thought I solved it, thank you for reporting, I will try to reproduce it to see what's happening.
I'll make sure to add your suggestions after the jam ends, I agree that the enemies projectiles are hard to track and it would be much more familiar if you could navigate things with your keyboard!