Manic Rift is a port to Scala of Markus "Notch" Persson's Minicraft game written for the 22nd Ludum Dare contest. Most of the port was done through IDEA's "Paste as Scala" feature, and as a result, has some very strange looking Scala code. I'm converting it gradually (and kind of haphazardly) to idiomatic Scala, and in the end hope to have a faithful port of the original.
If the mood strikes me, I might go further by doing more radical refactorings, changing internals, porting to libgdx and so forth. I'll be sure to keep the old "faithful port" as a separate branch if I decide to do that.
The license terms for Minicraft were never made clear, but Notch apparently released it for any use as long as other versions aren't called "Minicraft" (Manic Rift, in case you haven't figured it out already, is an anagram of Minicraft).