The higher levels are actually easier. The diamond ones are easy to get an "A" if you just get the diamond, and the triangle ones are easy if you're good at synchronizing your hands. They're way easier if you're just going for the medium badge.
Pro tip: You can click anywhere outside of the quest box to respond to dialogue. This may make you move if you double click, but it's better than moving your mouse too much for this rotten game.
Thank you for the report. We'll be looking into it when we're back in the office tomorrow.