User blog comment:Paul.campos/ The time levels were eliminated ... but not at all?/@comment-26388711-20180515091618

Check this King Care post: Timed Levels - Why are they being removed?

There are still a lot of negative reception with this change, so King might reimplement the timed levels. I don't know when, however, and that before the Timed Level's demise, they were the hardest levels.