First of all- congrats on finishing your first jam game!
Let's start with the gameplay. It's a bit of a mixed bag. The only minigame I managed to find anything is the timing one. All of the minigames lack player feedback. Some sound effect or a visual feedback would be a nice hint that I'm going good or bad. The game reminded me of "dredge" a bit. They only have one mechanic for fishing. In game jam projects the general rule is it's better to have one polished minigame, that 3 unpolished. From the other hand the atmosphere was nice. I enjoyed swimming around and fishing for memories.
As for the graphics and audio- also a mixed bag. Music and sound were good, and worked well to create a serene atmosphere. The graphics from the other hand are a bit unpolished. I think having a forest and a mountains in the background was enough- no need for a giant wall. The character could also use some animations (check mixamo for free animations for 3d characters).
The theme was well utilized. The only thing- don't give it away in the description! It would be cooler for the players to find out the plot for themselves. I mean, the writing is ok, and it get's the theme across.
Over all- this is a pretty good first-time entry. Keep it up!