Really interesting style and as you put it, it seems an ambitious project indeed.
The shader could be dialed back a little maybe to leave more surfaces (the nearer ones) in plain orange color to give them better contrast to stuff farther away.
You managed to implement a lot of interesting mechanics and one can see a glimpse of a broader open-word adventure game in this prototype.
And also I have a particular level of respect to anyone that manages to pull off a submission as a solo dev. Congrats
Cheers!
Edit: Also please add the corresponding credits to the description page. I wouldnt have known a lot of assets where from somewhere else if it wasnt for the ending credits.