I had a good impression of the game. It has personality and conveys the frustration of not being able to sleep very well. The close-ups of the eyes, the vibrant colors, and the overlapping images create a sense of discomfort that fits perfectly with the game's concept.
I especially liked how counting sheep ends up becoming another worry: the fear of losing count. It's a detail that perfectly captures how our own minds can prevent us from resting.
However, I think the pacing could be a little smoother, since many very short lines require separate clicks. The repetition works well with the theme, but combining some parts would help maintain the tension.
I would also increase the contrast of the dark gray text against the black background, since it was difficult to read, and make the consequences of the player's actions clearer.