A simple one: During gamepla in osu!mania, don't show the cursor even if the mouse is moved.
Several laptops does not have the option to disable the touchpad (mine has the fn key, but some more unfortunate ones doesn't), and time to time during gameplay it is possible for the mouse to be moved, and the usually helpful cursor becomes a distracting element.
Besides, there is no reason to keep the mouse usable during osu!mania gameplay. It can show itself again in the pause menu.
Several laptops does not have the option to disable the touchpad (mine has the fn key, but some more unfortunate ones doesn't), and time to time during gameplay it is possible for the mouse to be moved, and the usually helpful cursor becomes a distracting element.
Besides, there is no reason to keep the mouse usable during osu!mania gameplay. It can show itself again in the pause menu.