Nice shooter! I included it in my Godot Wild Jam #17 compilation video series, if you’d like to take a look. :)

Solid little game! I like the aesthetic, and you did well on the audio. Nice use of dynamic music. :D

First Impression

Nice Art Style!

Theme ⭐⭐⭐⭐⭐

The time rewind techniques is pretty and fits the topic. However, I never actually used it and I would say it is because the rewinded time window is to short. Sometimes after rewinding the time, it was even harder because I had to reorder where the things are on screen.

Fun ⭐⭐⭐⭐

Absolutely! Would be a cool smartphone game using the gyro, too. :)
Two ideas for improvement:

1) Increase the difficulty between the levels tremendously!

2) Why is there a score, when you have already waves? Especially when I cannot see the score after I died!? ;)

Controls ⭐⭐⭐⭐

 Stable. Maby the enemy size could be increased slightly - sometimes it is hard to be exactly on line. The Hyper does solve the problem somehow.

Graphics & Audio ⭐⭐⭐⭐⭐

Nice! I am not the biggest fan of pixel art but this one this well done! Parallax background, shaky cameras and the yellow tails are cool as well. Coler theme fits - nothing to worry about these grafics! Especially I like the ammo-display that follows the player. I wish the hearts would be displayed this way as well, so the player can keep focusing on the avatar.

Originality ⭐⭐

To be honest, this game fairly reminds me of the old space invaders games.

Anyways, you participated your very first time and probably learned a lot! In the game I submitted there is nothing at all that is entire original but isn't the jam about learning Godot? 😊