Fun: 5/5
The story was lots of fun, and made me laugh quite a lot. I forgot about the game overnight right as I was nearing the finale, so I failed, but the failure message was worth it.
Balance: 4/5
Building the level 4 items for each section was a bit long, and led to me walking away from the game while I waited, leading to my failure. But that was the only issue, well-balanced otherwise.
Uniqueness: 3/5
Gameplay was pretty standard, nothing too spectacular, but nothing wrong with that.
Theme: 5/5
The time-travel communications and passing of the final materials up through time was a perfect use of the theme. Great job!