Took me a minute to understand. Interesting concept but for me hard to get into the action fast - which I would love to do. But I think this is mostly a tweaking issue.
Ie you could let them be stationary or keep their distance from the player. They are range enemies - there is no need to rush the player. This would make the game a little easier. You could also start with only red, then only blue, and then start combining these. You could also add green melee units as well as power-ups. A level system could bring it closer to vampire survivors in 3d and split view.
These are just some ideas of what you can do to make your game more accessible. Anyway - great job!
*edit btw when switching you lose one view of the game. That results in one playing only one view and using it mostly. Try some benefits to the second view like aim lines or something like this. With more information the player can do more decisions