Educational games are a great idea. Being able to turn work into play definitely makes things feel more approachable, and the actual interactiveness of a game makes it more engaging. I personally can't stand to just sit down and *study*, so I kinda wish I had a teacher as dedicated as you haha! I'm sure your students appreciate this :)
I can't really list any MV games with good editor maps off the top of my head. Most of them use parallax mapping, but that's not really viable (or indeed, worthwhile) for a game like this, especially if you're trying to keep it playable on mobile devices. I like to lurk on this thread for mapping inspiration, though it's pretty mixed so you have to surf through for particular MV rtp maps.
Thanks for taking a look at Lost Boy! It's not really a self help game like yours is (although I'd certainly be pleased if it was able to benefit people.) There are a few other mental/health themed games in this contest if you wanted recommendations for any of those just out of general interest.
I don't currently have any plans to develop a new game of my own. The scope of this series doesn't align with my interests enough that I'd want to co-develop it, but I'd certainly be happy to lend you some support if you'd like. I don't have oodles of experience, but I am fairly confident that I can put things together without breaking them XD