2048 with Monkeys

Average scores for 100 simulated "monkeys on a typewriter" games of 2048.
[avscore] [up].[left].[down].[right]
means that a simulated "monkey" who chose the "up" key with probability [up]/([up]+[left]+[down]+[right]), and so on for the other keys, achieved an average score of [avscore] in 100 simulations.

139.32 21.1.21.1
148.4 1.21.1.21
158.12 11.1.21.1
164.88 1.21.1.11
182.64 1.11.1.21
189.2 21.1.11.1
201.68 11.1.11.1
208.64 1.11.1.11
381.08 21.1.21.11
414.04 1.1.21.1
414.36 11.21.1.21
427.6 1.21.11.21
427.92 1.11.1.1
429.36 21.11.21.1
433.48 1.1.1.21
438 1.1.1.11
453.48 1.21.1.1
463.32 21.1.1.1
488.68 21.11.11.1
493.2 1.1.11.1
495.28 11.1.1.1
500.16 11.11.21.1
502.28 1.21.11.11
505.96 11.21.1.11
515.08 11.1.21.11
518.24 11.11.1.21
519.2 11.21.11.21
535.56 1.11.11.21
541.68 21.11.21.11
555.36 1.11.11.11
575.24 21.1.11.11
575.92 21.21.1.21
579.36 11.11.11.21
583.72 21.1.21.21
593.8 11.1.11.11
595.2 11.11.11.1
602.4 11.21.11.11
605.68 21.21.21.11
606.84 11.21.21.21
607.72 11.11.1.11
620.24 21.11.21.21
629.32 21.21.21.1
630.56 1.1.1.1
633.32 21.11.11.21
633.92 1.21.21.21
637.04 21.11.11.11
638.48 11.11.21.21
640 21.21.11.21
642.2 11.11.21.11
647.2 11.21.21.11
649.4 21.21.11.11
652.76 21.1.11.21
656.92 11.11.11.11
694.56 21.11.1.21
695.56 21.21.21.21
695.88 21.21.11.1
697.16 1.11.21.21
705.44 1.21.21.11
732.56 21.21.1.11
733.72 11.1.21.21
735 11.21.21.1
741.12 1.1.11.11
752.84 11.1.11.21
760.4 1.11.11.1
776.24 11.1.1.21
792.76 11.21.1.1
804.96 1.11.21.11
806.52 1.1.21.11
808.64 11.1.1.11
813.84 1.21.11.1
823 1.1.11.21
832.28 21.1.1.11
838.72 1.11.21.1
847.16 21.11.1.1
851.8 11.21.11.1
875.64 21.1.1.21
879.28 11.11.1.1
885.72 21.11.1.11
900.76 1.1.21.21
924.56 21.21.1.1
924.68 1.21.21.1