I like when a 2 off is a matter of different routing and ordering. Enjoyable to solve.
I remove one star for the visual: a target located in the middle at 56 steps, with only one empty bottom row, would look nicer.
nubsy world completed :)
really difficult level, and the solution is game-worthy :) interesting to have many 4-offs, very good job, manti! how did you spot that?