The good one chosen:
The poster gives off a good sense of equilibrium, which can be seen by the dividing lines. The weight on both sides of the poster are the same when divided by the middle red line and the curving lines which shape the middle are almost similar.
The figure in this poster would be the light in the middle as it attracts attention with the strong intensity given off. From there, you would probably look upwards, as if you were following the path of the snowy road, into the forest and finally up to look at the dreamcatcher at the very top. A sense of continuity is displayed.
Words were contrasted against the dark background but did not rob the attention of the light in the middle.
Next is the bad one:
There is a lack in unity sense because of the cluttering of objects. No figure nor ground could be established properly because the audience will not know where to look first.
There is a bad clashing of the three primary colours as well as a few secondary ones. Mulitple usage of red and yellow everywhere which is supposed to be attention grabbing makes it hard to focus on which object to start off.