Hi, languagehasmeaning

Don't try to build it,  it can be difficult because of the possible issues with QT.
Simplest way to get GUI at Ubuntu:

wget http://downloads.sourceforge.net/project/boolberry/bbr-linux-x64-v0.3.0.41%28abcdeab%29.tar.bz2
tar -xvjf "bbr-linux-x64-v0.3.0.41(abcdeab).tar.bz2"
cd boolberry
chmod 777 ./qt-boolb.sh
./qt-boolb.sh

it starts GUI app. Wait until it downloads current blockchain and you can use it after that.