The art is good, and the music is rad; really love it!
The gameplay however... leaves a lot to be desired. First of all having to repeatedly press space over and over again is tiring; most SHMUPs shoot continuously. Secondly, the bullets fired by the enemies disappear when the enemy that shot said bullet die, and knowing the engine you used I know exactly what you did and how to fix it: you added the bullets as the child of whatever entity shot the bullet instead of as the child of the world or at least get_tree().get_root()
Thanks for participating!