Nice game! The music and art style gave me a Stranger Things vibe. By the way, I noticed that I can clip out of the walls by using a huge amount of bullets. I believe that you can fix this by making the projectiles disappear without spawning the crystal static object if they didn't kill an enemy, or by making the crystal objects dynamic so they get shattered if the player collides with them.
Overall, it's a nice game with a great concept. Keep going mate!