Love the concept of MOBA styled touhou a ton! Love the mix of 3d environments with the 2d sprited characters. The attacks are clearly marked with the hitbox of the selected move, and the explanation of mechanics are explained well enough. I think the tabbing between the controllable characters gets a little messy for me personally, and I found I think I broke the game switching between units too fast. When I switched between Patche to Hourai, I did it too fast and Patche started floating off screen, and the characters were no longer selectable. Only happened during the Kogasa fight, but I can recognized it probably wasn't intended for frantic tabbing between characters as I adjust myself so I can take down Kogasa. It gets a little difficult to manage everything at once when you have to dodge AOE's with three different characters in rapid succession so their health isn't too destroyed, but movement itself is still good!
Love this idea, and would love to see it adapted to other characters if ever expanded on. Great work!