Very challenging!  I Love this concept of controlling multiple characters at once!  Amazing amazing!  Great concept.  I would love to see you build on it more!  Good job!

I agree with the others that this is very difficult in its current form. I personally thought the firehead enemies were very fast, and I thought it was tough that the flying enemies shot directly downward and most of my units shot directly upward, making it quite tricky to effectively keep them out of harm's way. So more unique firing patterns on the squad could help with that, the bow is a nice start. I also wanted to suggest formations rather than individual positions. You could let the player customize a number of these that could be changed on the fly, and they set up their units to their liking before the fight. Combined with some upgrades, that's a nice strategy layer. All that being said, I like seeing like ideas like this because they're obviously trying to break new ground. What would a multi-unit bullet hell / heaven look like? You made me wonder. Thanks for that.