My recommendations are Dodonpachi Resurrection, Mushihimesama, and Deathsmiles. They’re all on sale, they’re all made by CAVE. One more CAVE game, Akai Katana, is also listed but it’s not on sale. They are all extremely difficult if you have never played the style of game before (Japanese arcade bullet hell / scrolling shooter). Heavy emphasis on learning bullet patterns and doing precise dodges. It feels so good when you manage to dodge a pattern, or time a screen cancel/hyper just right.
If you only try one, Mushihimesama is 6 dollars right now, has an awesome soundtrack and a cool fantasy forest and insect theme. It’s relatively beginner friendly but you will definitely notice a sharp difficulty spike going from stage 3-4-5. I got to play it on an actual cabinet at PAX west, definitely my highlight of that weekend.
steal_your_face