I have been a fan of digital escape rooms in the classroom for a couple of years now. I like creating them and consider them a useful tool for review at the end of a unit. They also work very well for me as emergency subplans - students will be engaged and doing something worthwhile and I do not have to worry about setting things up, making copies or really anything else, other than assigning them in Google classroom.
All of this being said, I'm always on the hunt for puzzle ideas. For starters in order to keep it fresh, I do like to be able to challenge them with puzzles that they have not seen before. While they are always different because of content, there are only so many times that you can present a maze, clock or 4 x 4 grid.:
On the other, some of my students have figured out that if a code is only four letters and those letters repeat in a "clue item" they can pretty much spend their time guessing. In order to eliminate that, I do like to use substitution cyphers which do present a bit more of a challenge:
Another example is this crossword whose answers reveal a scrambled word that should then be unscrambled and used as a code.
What other ideas do you have for your digital escape rooms? I'd love to hear about them :)