Okay I downloaded the .zip and tried it. First of all I liked the visuals they really pull, the controls are nice too.
At first was confused how to beat the rhombuses but then realized they can be shot at certain angle, but I'm still not quite sure what angle it should be so I just switched between views before finding one that works, which eventually killed me. If I could tell which direction I need and also could easily tell where to turn instead of doing a 360 that'd be nice. Also because of that it didn't feel difficult but rather unfair.
Now I expect you to download my .zip and try it: https://signa-in-mundos.itch.io/scimitar
Ignore the visuals tho, I'm mostly interested how the controls feel and if it's fun.