So glad to be part of the Fossil Finders Excavation Team! Really impressive for a first game jam and your first time doing art! Actually one of the more fun games in the jam and I liked the story and how it led you around the map.
The washing mechanic could use some improvement. It seems like you can go into the washing table when you have nothing to wash, so I spent a long time washing nothing when I needed to find another bone for grandma. Also the visuals of the black bar weren't aligned with where you would get points. While the black bar was moving from point A to point B, you would get points for being at point B before the bar actually got there, and you'd stop getting points as soon as it started moving away, even if you were still overlapping. It actually kind of added a unique challenge to that mechanic but it didn't seem intentional and that behavior wasn't super clear.
The song that played when you entered the town was cute, but it was a lot louder than the beeping noise so after you entered the town you had to wait for the song to stop. Maybe the beeping isn't supposed to be happening in the town at all? It would also be cool if there was a visual indicator that matched up with the beeping so you didn't have to solely rely on audio.
Last thing: it would really add to the game if you could see the bones while mining and washing and even outside of those mechanics in some sort of inventory system. I totally get it if that was just not something you could squeeze in during the game jam timeframe, but would be nice to add in the future if you keep working on this.
Overall, it's a compelling game and I did play all the way to the end. Hope you had fun in your first jam!