The deadline is now just hours away in the “Doodle 4 Google” student contest.

Thousands of young artists from across the United States entered their ”student doodle” versions of the Google logo. From that field, Google’s judges culled the contest to 40 regional finalists who are now in the running to win — based on your vote.

The finalists’ entries range from marine scenes and jungle-animal illustrations to art that focuses on environmental and world-hunger causes.

Public online voting will close in five hours ( 11:59 p.m.PT).

According to Google, this “public vote will help determine the four national finalists, one per grade group (K-3, 4-6, 7-9, 10-12). You may only vote once in each of the four grade groups.”

The national winner will be announced May 19 in New York, and that winning doodle will appear on the search-engine company’s home page the very next day.

Comic Riffs is duly impressed by more than a few of these entries; you can go see what you think — and if so compelled, cast your vote.