Good work on this game. I feel the music would probably have fit better if rain was lashing down and the trees were swaying the wind. :)
Didn't manage to find the portal, but looking quite hard.
Not sure what you used to build this, but good work on the 3d character movement and rendering. Solid effort and creating a barebones walking sim.
I wonder if you could also allow the user to place a marker in the distance with the central cursor and then there is a pointer towards that, so a bit like the compass and quest marker in many games, but it is just the dropped pin from the 3d view to allow the user to remain locked on. You could even have the user being able to climb up for a view and then add multiple markers to go and explore for in the future. Not sure where you are taking this, but ideas for thought.
Great work team!