I can't wait to see where you take this, it's super clean and easy to pick up and play around with. On the last level, I felt like the difficulty curve ramped up, which was pretty fun. I thought the journals were a nice touch as well, I'm already interested in learning more about the world!
The audio cues and music during one part of the last level were spot on as well. I think my eyes just aren't as good as they used to be, but I would love to see something a little more like a solid line for the interaction indicator. Since the particle effects are dots as well, it kinda blended in.