The concept is interesting but I think that the enemy should spawn from the edges of the screen to prevent them from spawning on the player. In the last stage the air meter should fill a bit faster, it's a bit boring having to wait for it to fill. The game is fun though.
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Thank you for playing and for your comments.
I was thinking in a way the enemies respawn from the sides, as i played a long testing i thoug it was easy, but it should be needed to make them appear from sides or at least not from the very center of the screen.
I will make the air metter fill faster, as soon as the jam is completed and i can upload a new version. I hope to add at least another scene too.