The first "tier" of moods on the moodlist should have an icon assigned to them - they don't need to all be seperate icons but it is required if any duplicate icons at least match the moods you're assigning them to.
If you'd like to submit them as a public theme on this website, please email me and I will forward you the submission instructions. Once submitted, it may take a week or two to become available, but they'll definitely go up ASAP.