Putting my final thoughts here after playing the Patreon version since this was the place where I first saw this game.
It's a 5/10, a middling game, in it's current version state. Dev seems responsive to feedback, which is nice.
"ERICA, Knight of the Sun" has a fairly simple combat system; Z to attack, C to dodge in the direction you're looking at. Jump isn't useful in combat, but works well enough outside of it.
Bosses don't really work, which is something I've seen others say before. They just launch attacks and don't really let you know when they're coming; no flashes, no animation freeze for a fraction of a second, just launches an attack. Since the only way to avoid is to dodge and dodge has lag, you get hit a lot during bosses.
In-game economy is shambles; you need a TON of money ("Essence") to move forward in the game. Seemingly after hitting the second town, it doesn't matter anymore; there is no shop anywhere, so money becomes useless.
I like the music, animations and overall feel. The h-animations are great pixel stuff with occasional larger more detailed pixel images. Shame that to get those h-scenes you gotta lose in some way; archaic system that never worked. Hopefully it gets scrapped completely here and it just becomes "Defeat an new enemy, unlock the animation set immediately" kinda deal.