Firstly I apologise if this idea duplicates any already mentioned in the previous 44 pages as I haven't read them all yet.
It's extremely frustrating when you come across a level like 1476 with 3 minutes left on your lunch break. It would be ideal for me to be able to schedule levels according to how long each attempt will take.
My solution would be advancement by episode rather than level so we can choose in which order we complete the 15. Also some indication of the number of moves allowed before starting the level would be great.