* issues
* todo
-** objects placement
-** shelf's logics (rotation, scale)
-** buttons
+** rotation with vectors/quaternions (fixes some glitches)
+** configuration (physics debug, music/sfx volume)
+** logging.info|debug in the console
+** instructions
+** main menu
+** implement the operations of the buttons
+** build pipeline
** magnet
* waiting
** version 0.0.yymmdd