Thanks for the thorough feedback.
I see what you mean about the size of the levels and the tree collisions(since you can walk "under"). In terms of combat, I didn't want player bogged down fighting Tigers at the expense of game progression. I put the two boss fights as lowest priority and squeezed them in during the weekend before the deadline for that reason, since it kind of takes longer to get those than any other slab in the game.
Regarding the amount of content. When I found out the theme of the Jam I wrote out a word document plan of all the characters and features I wanted to implement and how I'd expect to create/code them. I also had some restrictions on myself to make sure I didn't spend too much time on an individual thing like as soon as I finished a sprite, I would not go back to adjust it, same with the map layouts and some of the mechanics. Though I did end up making concessions by the end, I ended up implementing 21 of 30 slabs, leaving some parts of the map a bit empty and kind of left the trees as they were in order to work on the rest of the content.
(Though I think if the whole lockdown didn't happen I doubt I would have finished on time, I'm working remotely during it so not having to travel to work and back gave me a lot more time during the morning and evenings)
Thanks again.