Cheesing Hong Meiling in Touhou: Luna Nights

There's a couple of things that make this possible.
Firstly, you need to be playing in fullscreen and have the game run at 30 fps. (Note the "30" up in the top left corner near health, magic and level.) I've tried this on 60 fps, and Meiling's guard refreshes too quickly, preventing your knives from getting through.
Secondly, you need to be at the proper distance from her. If you're too far away, her guard will refresh and block the knives, even at 30 fps. A few might get through, but you'll just be wasting magic. If you're too close, however, she'll whack you and start moving around, effectively ending your combo. In the video, I fiddle around with distance a bit. At first, I'm a bit too far away, and I likely could have beaten her even faster if I'd done this strategy perfectly.
Thirdly, this was performed with both the health and magic upgrades you can find, in addition to the stun knife to continue doing damage after running out of knives during Time Stop. Of course, I had also purchased the extra knives from Nitori's shop to get that extra damage.
Touhou: Luna Nights is a fanmade Metroidvania style game starring Sakuya Izayoi from Team Shanghai Alice's Touhou Project. It's currently in early access on Steam, and although only the first level is out at the moment, I highly recommend it. The devs seem cool.

[@LUKEKICK1]

Nice.