Some tips:
1. Try to make it in a more squareish form. A few hanging off the bottom is fine, but I don't see a reason for five going off the top.
2. This could be a lot more organized. You just have random colors everywhere. I see you tried to make it organized into colored columns, but it looks sloppy for some reason. Making them go from dark to light might help.
3.
Tip: Don't publish your first creations