Very cool game, even more if it's your first one. Congrats! I also think it would add some tension to the game, if the shield also has a cooldown similar to the shooting. Additionally the cooldown(s) should be visible to the player, so that you can play more strategically. That's just some improvement ideas, in case you want to update the game in future.

My review (Sorry for my English, I'm a Spanish speaker and I use a translator).

This is my first jam as well. Greetings, fellow beginner.

There are only two levels, but they're good. It's a creative concept, and I really like the shield concept. It's very good. Perhaps some aesthetic details could be improved, like the font choice, which is Unity's default. Perhaps giving the player a smaller cooldown when shooting and giving the shield a cooldown could be elements that improve the gameplay, making it more balanced.

This is my full review (Don't forget to review my game too).

So it's time to evaluate (I hope you will also evaluate my game, because there was really a case when no one evaluated my game and it did not even get to the last place), I love this arcade game, the music is well chosen, no bugs, the levels are few, but acceptable, I will reduce the score only for creativity, because the idea is not new.