9/5     ~pld/bubblet.el now v0.62.  Undo now affects the RNG.
        Also check ~pld/bubblet-scores. -pld
        \_Games:   10    Avg:  636 / 3.06    High: 2552 / 3.18 -pld
        \_Games:   10    Avg:  530 / 3.02    High: 1328 / 2.97 -tom
                                \_ how do these scores relate to those
                                   below?
                                \_ newer format, additional info (avg blocks)
        \_Total games:   29     Average score:  294    High score: 1084-ali
        \_Total games:   80     Average score:  261    High score: 872-oj