There are a lot of games which ape (!) the general theme and feel of Stardew Valley, and SDV itself owes a lot to early Harvest Moon and Story of Seasons so it's not uncommon to see pixel art pastoral games seem to copy SDV. And seeing as SDV is the top rated game on Steam with over 100,000 reviews (wow, eh?), it's not surprising that it would inspire someone else to try their take on the genre.
Well, ahmmm... yeah but this one. The art is real similar, like a super lot real close and similar. But the character creation screen pretty much convinces me that is is too close of a copy because-- it's practically identical! The game in general seems like it's a mix of Ultima V or VI with the modern interface of SDV. I dunno anything about legalities but it's likely that some of the SDV assets were copied and slightly reskinned and then the game wrapped around them is a little more fantasy-RPG oriented.
Predictions:
Boss name in Final Battle: Dolores
Town leader: Louis
Local Bachelors: Axel, Gertie, Roger, Dave, Flounder, The Man With No Name
Local Bachelorettes: Martha, Charlotte, Bill, Rachel, Mary, Ruby
DLC expansion site: Thurston Howell, III Island
Most hated enemy in The Boney Caves: Frying Sherpas (throwing burning hot Kur from across the screen!)
Most OP weapon: The Nebula Kneecapper
The ultimate acquisition for the game: The Stick What Saves Your Butt By Transporting You Directly To Your Front Door Bed
I'd use that last one at least once a day and likely before 9am.