The art was lack luster but I suppose you can't see it for long. Perhaps if the game started in a dimly lit environment before everything went black, then you wouldn't be able to make out the art as well.
The rocks and trees making sounds when I get near them just sounded weird. Maybe bushes that make sounds when you walk through them would have made more sense?
It was hard to tell how close the gate was when its SFX played, unlike the items which were much easier to hear.
The low droning sound that increases in volume before abruptly stopping when you collect the item was fairly satisfying.
Overall for game made in 2 days, it was pretty cool.