A6 Advertising Post Card

C'est ce qu'une entreprise en/au(x) Australia recherchait pour leur brochure design

I am looking for refinement on this idea for an advertising letter-box drop of an A6 postcard.
Side 1 - our brand, the address, "15% discount if you present this card before Dec 31"

We are a new retail concept in terms of the store concept.

Side 2 - i want to highlight where the products are from, what materials are used, emphasis on cool, fresh, different, affordable, the product ranges grouped by colours (storage &organisation items in 1 colour or font, illumination products in 1 colour or font, furniture in 1 colour or font, decor in 1 colour or font, curios is 1 colour or font, fasion in 1 colour or font, others in a 1 colour or font)

The Product Categories:
see attachment Voir plus