Great game! Two potential bugs and one place I just seem to be stuck.
Bug 1: I completed the 3-item task that gets you a chest inside the cave. I clicked on the chest and got a notification that I don't have enough space for the reward. When I exited the notification, the chest was gone, and I didn't have the reward. I tried exiting and re-entering the cave, but no luck.
Bug 2: I'm level 6 cooking. Somehow, I made some fungus sap, even though that says it requires level 9. Now, if I try to make it on any grill I have unlocked, it prevents me, but guess I somehow made some at some point? I'm honestly not sure how.
Stuck: How do I make a plank?? I'm level 6-8 in every skill, but I still haven't figured this out. I've tried using the hammer on everything in/near the sawmill with no luck. Two items tell me "I don't think that's the right machine to use this on," but the other seemingly just does nothing when I use the hammer on it. I've approached the water wheel from the east but can't find any sort of interaction there either.