Mushi Futari is the perfect start for someone new to bullet hells. Menus are in English, and in Original mode (which is the only mode you should be playing at first) there are no game mechanics beyond shooting and bombing. Even the scoring takes exactly one sentence to explain: if you can, kill enemies with laser when the big counter is blue, and kill enemies with spread shot when the counter is green. The amount of gems flowing onto the screen tells you when you are doing it right and when not.