1. the top header on the letterhead feels very top heavy. That and the redundancy of the logo on top of the pattern of the same size is what's doing it. Maybe the logo can be moved to the bottom left corner? Or just remove the pattern altogether.

2. I like the business card but the info side feels a little squished to the bottom, especially with the social media icons being so big.

3. The style guide cover kind of breaks one of your rules of not messing with the logo. Remember, you're making the rules here...so don't break em.

4. Watch your font headers. You have a serif font on page two and it's not one of your fonts.

5. Make all elements smaller, type, logos, etc. Again, don't break your clearspace rules.

6. Pantone codes?

7. "Do NOTS"

8. Maybe rename mockups to collateral.

9. It's a very playful brand and style guide. Can you inject some writing/instruction into it?

10. How will it be bound or shown?