6 endings in a 10 day jam game????? This is nuts
I've enjoyed it - lots of room for strategizing, until the last minute of play I've been discovering new optimizations for nut collection. Slight degree of exploration, too - I always like to buy passive items with interesting effects in games.
The tutorial is... um... It's not terrible but it really just made me click out of it and find everything about the game on my own. Do you really need it? Why not just give hints during day 1-2 as to what the player should be doing?
Now, I think the main flaw of the game so far is the pacing. 10 relatively long days, and other than gradually increasing ent counts nothing is really happening. All ent types are introduced from day 1, and... that's it, every day is more or less the same as the previous. I think currently the length could be safely cut to just 7 days without anything of value being lost.
In addition, it would be great if the game gradually introduced some new ent types (e.g. a hollow ent which moves and attacks faster, thus easier to kite, but drops fewer nuts), as well as points of interest (e.g. treasure chests with nuts or other items if they were to be added. There could also be some kind of contraption that you'd have to bring the expensive metal nuts to)
Other than that - solid foundation with a great theme implementation. While it did feel like it overstayed its welcome, I had a good time until then. Congrats on finishing the jam!