From upstream ⁽¹⁾, lbreakout2 is unmaintained, would be great to have LBreakoutHD ⁽²⁾ instead in the portage tree.
Created attachment 558054 [details]
ebuild for lbreakouthd-1.0.2
ebuild for lbreakouthd-1.0.2, inspired by lbreakout2 ebuild.
nls and themes useflags are available.
Additional levelssets package is not handled, it seems to me that all levels are already installed.
Tested and worksforme on stable amd64 under Xfce.