Inpalsus controls look like they'll twist your brain

For floor notes, you have to cover 6 keys with one hand, and control the airborne notes with your mouse. It's recommended to keep your left pinky and thumb fixed on Left Shift/Spacebar, and use the remaining 3 fingers to cover 4 keys. It looks like it'll twist your brain just by looking at it... But I tried the demo myself, and it's surprisingly not that chaotic. What's actually brain-twisting is Tancagu Panro... It's one-handed 2/4 keys with the left hand + directional keys with the right hand, but here you have to dodge bullet hell while processing notes, and it truly twists your brain...