Sisters Royale: Five Sisters Under Fire Review (Peck)
It's a fun shmup by the developers of the Castle Shikigami series. Graze bullets, shoot everything with your secondary shot, have fun. Easy mode feels like a good difficulty mode for people who are brand new to the genre, especially if you pick Sonay (the beginner character).
As a more experienced player I felt like the gameplay was a bit on the bland side at first, but I immediately starting enjoying the game so much more when I moved away from Sonay and tried out the other characters. There's a huge difference between just sitting at the back of the screen playing Sonay for survival, and aggressively speedkilling enemy waves and milking bosses as the other characters. So I highly recommend picking Sonay if you're new, and I highly recommend trying the other characters as soon as you get bored.
Playing for score makes the game much more interesting too. It really encourages you to get aggressive, speedkill as many enemies as possible and milk lucrative boss phases, all while constantly grazing bullets. The game really is as simple or as complicated as you want it to be.
Here's my hard mode 1CC as Ece:
https://www.youtube.com/watch?v=1IR8M9CnGjU
My least favorite thing about the game is the environmental gimmicks, but at least they can be routed around to an extent. Wind only applies when you stop holding a direction, so you can ignore it by moving through it without stopping or by pushing against the bottom edge of the screen and moving left and right with diagonal inputs. Ice...appears early enough in the game that you can just bomb through it and earn more bombs afterwards. It's not ideal but it doesn't ruin the game for me.
Anyway, I recommend giving it a try!