I was able to figure out the gist of the game through the title. If I didn't have that, I would have wondered what to do. I think a very small cut-scene of some sort would've help a lot.
Graphically.. this game either had an uncapped frame-rate, or is using very resource-intensive lighting, because my computer fans spun up when I ran it. I do appreciate the simple visuals, and I think they complement the gameplay. I think the environment design was good, there was just enough "clutter" without making the game too hard.
I appreciated the music, although the "wrong item" sound effect was a little grating after a while. I think it was too long and too high-pitched for a sound someone will hear a lot.
Overall, I like the idea, and I did find myself wanting to play more when it was over!