There are three kinds of levels:
This is not a question, just an observation.
Easy - because you figure it our very quickly and/or you get lots of help.
Hard - You have to figure out the table first, to understand it and/or it takes more time to get the combos.
Ridiculous - A lot of 'board resets, because there are no plays' and 'single choice plays' or you have to play one game after another until you get a favorable board. Waste of time, that looks like Candy Crush trying to sell me something.