Hey guys, I saw this contest hosted by @sndbox here and I thought of submitting my own design.
I used Canva (free) to design this and I followed their color palette as per the contest requirements.
Since @sndbox is usually associated with a "sandcastle" built by a community, I used a castle as the center of the thumbnail. It's a really simple design so I hope you like it.
Thanks for checking out my entry!