Really interesting concept! I liked the idea of controlling two different characters, that were still connected. While I'm not a huge fan of bullethell games, I definitely felt the urge to continue playing this game!
One critique I would have is that I was super confused at the beginning, as I did not know where the enemies were, nor did I know that i could control/shoot with both characters. In addition, a lot of the sound effects, while good, had high volume and was ear piercing to me (as I was wearing headphones).