I admit, the spikes were frustrating, but the walkthrough at least makes up for it in case one is frustrated.
But a powerful message indeed. The shortcomings of the disabled, even if they find ways to overcome such issues, they are still weak in some ways. But this man is blind in another manner as well. His compassion, though good, made him concentrate too much on the cries for help without being aware of his environment (Dumpster for example. Even a blind person would notice his/her surroundings, the main character just walked past them). The blindness in his mindset is what caused his unfortunate ending.
Which brings this next question: How was this man truly blind?