The projectiles are SSOOO FAASSST, lol. It's really hard to dodge them by reflect. died countless of times( but the gameplay is somewhat addictive :D)
The space ship's movement is also too fast, at least for people like me.
Suggestion:
- I think it's better to allow enemies to shoot only when we can see them ( you can simply use VisibilityNotifier2D )
- like i've mentioned above, slowdown the speed of the spaceships and projectiles.
Other than that, great.. job dude :)