At the bottom left of your post, below 'Rep Power', there is a star and a triangle, probably very faint depending on your screen settings.
The triangle is 'report post' (hopefully never used on yours, but useful to know about in case you ever spot spam or anything way out of order).
The star is 'Reputation Power' - click it and you get the option of giving a positive or negative reputation point, with positive as the default - and there's the option of adding a brief comment as well. Negatives hopefully are rarely used, but a postive gives you an extra bit on the green bar under yur name, and you get a message in your Notifications saying who gave you the rep point and passing on any comment. I've just given you one - your artwork is seriously good :)
If you're kissing Death make sure you've got a blue protruding tongue.