I had a great idea to turn some of my favorite game's rhythm based minigames into beatmaps here in Osu!, but emulate it correctly, they would have to be able to click an entire section at once, and to slide in any direction, but with no set distance. You could shape the hit circles to any shape, even big rectangles, and for the arrows, when they were set, the player would have to slide the mouse in the over the length of the arrow before the outer circle reaches the arrow.