A preview of your liking which will excite viewers to click on your work. Perhaps a collage of snippets from each artwork, or one artwork which you like best and the text "click for more" or whatever, be creative :)

but what to use as small image?

By collaging all the images on one canvas and uploading that as a single submission.

how do I showcase them all together in one submission?

Hi Melodee,

These are nice works, but if you don't think they are even worth giving a name then we don't think they are worth being showcased in the gallery. Since they all seem similar, why not showcase them all together in one submission? Thanks!