Level 10: Collect all arrows without losing a life. This is the only level where the arrows will disappear as you pass over them. Without fail, they are leading you to danger, so take it slow and don’t over throw your character. The three hit protection from the first bonus level will help if you are struggling with a few of them.
Level 11 & 12: Collect all Balloons without losing a life. You probably would have done this anyway, but like with all other don’t die achievement, take it slow and use hit protection if you have to (you may have unlocked the second bonus level by now for five hit protection). Make sure you explore every path to ensure you get everything.