Very nice game! I liked the graphics, they were very reminiscent of the 90s aesthetics, and the music fit the bill as well! I felt like the bullet patterns escalated pretty quickly, but it was still bearable most of the time thanks to the responsive controls and the focus mechanic. However, it was a bit hard to tell if the different gem types did anything different other than moving at different speeds and dealing more damage(?), and towards the end, my own bullets made it pretty hard to see the enemy bullets.
Sadly, I didn't quite manage to beat the big goblin lady at the end, but I went into the other room and the game said I won, so yay me I guess! Either way, it was a fun little bullet hell adventure.