About
GtkBalls is a GTK-based clone of the puzzle game Lines, offered in both GTK2 and GTK3 builds (GTK3 by default) with HiDPI display scaling support in the GTK3 version. It runs on Linux.
Getting started
Build from source (autogen, configure, make); the GTK3 build supports HiDPI scaling by setting the GDK_SCALE environment variable to 2 or 3 before launching for a larger interface.