Puzzle Looking Glass is part of my dissertation. I added Programming Completion Problems (similar to Parsons Problems) to the Looking Glass programming environment. The open-source version of this code can be found at github.
This download also includes an editor that enables users to author their own puzzles. See the World menu to access the puzzle editor. Please note that you can right click statements within the editor to change their behavior within the puzzles.
Download Puzzle Looking Glass. 1.1 GB download. 64-bit only.