I wrote a post a few years ago about creating digital breakout games. You can view that post here. Quite a few things have changed, so a new post was in order. Matt (@jmattmiller) was kind enough to let me be a guest blogger on his site. He also added a sweet planning guide to help you with the process. Head over to ditchthattextbook.com and check out the post.
You can also check out my TrianglesOnly.com escape room that I posted last year.
Make Math Not Suck 