We have Explosion card pattern that would be awesome with this! How-to Make a Fondant Explosion Cake- use royal icing to to make stars and other things. I would not use fondant tastes yucky, prefer buttercream icing .
Chocolate Salted Caramel - buttery almond crust, gooey salted caramel and bittersweet chocolate ganache, all garnished with salted crystals. Technically a tart, but anything that oozes caramel like this does is candy in my book.