A Review of Poster by Yair Mor

Here are a few points to consider:

1. You should come up with a solid color scheme here.
2. It seems like you try to bring every element you've got here to the foreground. Try to put stuff in the back, like a few circuit boards.
3. In addition, think about the composition. If you're stuck, try playing around on another layer with primitive shapes like rectangles and triangles in order to make a better composition.

Good luck!