This is a fantastic little demo which is great in its own right. One observation - it was pretty frustrating to find the last object (which for me was the neon sun, for other people it might have been other objects). I scoured the map for it for the same amount of time it took me to find the other objects. And I ended up looking for it on Youtube. So you might want to introduce some sort of hint mechanic to prevent player frustration.
What engine did you use to develop it?
Thanks, I'm glad you liked it! I should be putting up an updated version of the game soon, and it does have a simple hint system. It'll also have a quick teaser for Under a Juniper Sky included. As for the engine, I'm using Unity. It's really very nice, and there's tons of tutorials and help online for people who want to get into making games.