Morales writes about what it feels like to be unable to speak up and to be judged for it anyway. The speaker compares their daily life to charades and to being a mime: people have to guess at what they mean, and the guesses are usually wrong. Wearing glasses so no one knows who you are, and walking the school hall with a "painted" face, both suggest hiding behind a mask. The poem also mentions scars, though it doesn't say where they come from.
The hurt comes from labels. Classmates see "that freak," lump the speaker in with the "different" kids, or call them an attention seeker, when the speaker simply can't be a "Speaker." The poem hints that silence is being mistaken for a personality.
The mood is lonely and quietly frustrated. The last lines, "It's all apart of the game" and "when deep down you know," trail off without finishing the thought. That leaves a sense of something the speaker knows but can't say, which fits the poem's whole point.