I wasn't sure what to expect going into this one, but it's a pretty neat concept! Magical girl protecting the environment, card-based combat, and a retro aesthetic I don't see very often.
This kind of game lives and dies by its UX, and this one is more the latter. I was able to figure out how to move in the overworld, but it wasn't immediately obvious, and I could figure out how to attack but I still have no idea what half the cards do or what the symbols on them need. This is a program that needs a manual and doesn't have one. For the most part I enjoyed what I could play, but it was clear there was a lot I was missing and that hampered my progress through the game. At the very least it needs a textual tutorial, ideally I'd like to see better UX. Unfortunately I think the black and white retro aesthetic really hinders the readability of the UI.
I'm kind of on the fence about the aesthetic in general, to be honest. On one hand, it's unique and different. On the other hand, it's kind of hard to look at, and I like colours a lot. In the end I think it's better to try to differentiate, so I guess I'll fall on the "more a good thing" side of that fence.
The long and short of it though is that as much as I like the idea of this game, the poor UX and lack of instructions render it a much less enjoyable experience than it could be.
On a side note, the executable requires running as administrator, but is probably just an installer because extracting it with 7-zip yielded a game executable that does not. If you can find a way to avoid this, that would probably get a few more people trying it.