"Puzzle Mix" is the most extensive set of the package. It contains the following level categories:

"Boulder Dash Only" (30 Levels) - is limited to only a few classic elements to present as much as possible of original Boulder Dash.

"Boulder Dash Soko" (10 Levels) combines particularly Boulder Dash - and Sokoban - elements.

"BD - JUE" (20 Levels) is the stage especially for my own custom elements but you don't have to learn very much, because everything is self-instructional and easy to understand . Sometimes I had to rebuild normal R&D elements (as CEs) so that a rock is able to interact correctly with an elevator for example. Meanwhile you can build nearly everything with the options of the level creator. In the R&D Forum people often ask for new CE-properties, because they think it's impossible to design their favourite elements with the current editor - but in most cases it's absolutely possible only with a little resourcefulness. I think often it's just the appeal of CE - construction that you need dozens of (invisible) backing- CEs to garantee the right behaviour of your desired element. Don't you think so ?