Gemini000: the hint for the next game is so easy, that I would be disappointed if the leisure is not it 😉 Anyway I think these links to boulderdash games, would be helpful to many.
Artsoft Entertainment - Rocks'n'Diamonds
http://www.artsoft.org/rocksndiamonds/
Boulderdash - Martijn's Boulder Dash Fan Site - Freeware and Shareware Boulderdash Clones for PC
http://www.bd-fans.com/
Now we are going to have a field day, cause I first heard of Marek through his site
Mareks Seiten für Fans von Star Trek, DN3D, Boulder Dash und "The new Dash Dimension"
http://www.gratissaugen.de/erbsen/
C64 Boulder Dash page
http://www.gratissaugen.de/erbsen/enc64dash.html
Boulder Remake
http://home.deds.nl/~bremake/
Great episode by the way, but I think you should mention that if you want to play supaplex in Windows, and "Fuck DOSBox!" , then you can play Supaplex through megaplex. Which is on the site you mentioned (the elmer production site)