Overall I like what you have made. So first the things I had issue with. The biggest is the jump key felt unresponsive. Several times I would press the key and nothing seemed to happen, not sure why. I also found the music fine at first but given how long you spend wondering around it got a little tiresome. Just lowering the volume a little might help a lot preventing it being quite so overly focused. A more personal note, I didn't like that I was stuck being unable to complete the game because I failed to get enough emotions before the cut off drop.
Things I like. The fact you gave a bit of back story to what was going on. While the music was a bit much, it fit with what the game was saying. When the jumping was working, the movement felt pretty good. I was mostly able to direct myself through even difficult jumps with little problems. The overall art style worked well and was quite good with the restriction to black and white.
The last thing I want to say is I wish the character evolved, even something small like a facial change, as they got more emotions. Something aside from the number in the corner to represent progress.
Great job with the game.