Edited after considering comments below
At present it is possible to leave a public comment on a watch face via the Android app (I could not find this functionality via web browser, to view or post).
It is also possible to like a face (app & web), but the total number of likes a face has is not viewable publicly or for the designer.
An easy change should be to display the total number of likes per face (at least for the designer if not publicly).
Whatever is implemented should be consistent across the web and Android app platforms.
For an improvement, I suggest allowing users to also add a star rating for faces, similar to what the Google Play store has for apps. This could be useful for both users and designers.
The rating functionality along with the comment should be available via the Android app and via web browser.
If implemented, ratings could also be used as filter and/or sort options for general search as well as on a specific designer’s profile page. Else just use the number of likes.