I liked was how the bushes rustled and wiggled as you moved through them. This detail makes the game feel a bit more immersive but it also has gameplay implications as your sounds can obscure the sounds of the goblins. I also like how the music lowers in pitch as your torch loses light.
An issue I ran into was I struggled to find the last goblin in the first level. I would hear his sounds but kept losing him. I don't know if it was bad luck or I'm missing some sort of strategy. I eventually just gave up on finding the last one after wandering around and losing interest. Maybe it would help if there was more visual clues to where the goblins are at.
I enjoyed the brief moments where I was running after the goblins that tried to flee. Maybe if you revisit this project, you could emphasize the chasing element more? I enjoyed that aspect more than searching for them. Maybe the later levels have more of this, but I didn't get far enough to know for sure.
Overall, great work and nice job on tackling both themes! You have to find the goblins (Hidden) and you get a choice of upgrades for each goblin (Free Choice).