Super hard but super cool! really traditional style! i wish games like this would explain what power is exactly or how much of it i need to upgrade my gun, but i know that's not the style so it shouldn't really reflect in the review. I originally thought "why would i ever get out of blue form if i can break the big bullets" only to realize in a later run that the spread shot is great for enemies i can't get directly behind, though i wish that the red form also had a bit to show me what my actual hitbox was, as that gets a bit confusing.
But that's emergent gameplay! as a player i'm learning and developing strategies while playing! which is an incredibly good sign, i think this is belongs as a top pick honestly.