Ok so here's some observation sharing:
Predicting that we're going from top to bottom, each line represents one of 8 directions. So there are only 8 possible "arrow patterns" for a line. So i was thinking of a phone keypad with the T9 function, but we're lacking a symbol for 5 then (center direction), and i thought the "up left - 1" could take it since there are no letter on the key 1. This actually produced a few existing words, but then again others totally collapsed in this theory. I'd like to get a clear explanation of what were the spaces mentioned above - are they the empty lines ? And would also like a clear picture of the lines under the black top/bottom edge of the screenshots to be sure how many arrows are there and which ones in each line. It can be predicted with the current screenshots but we should be able to know for sure i hope.