"Are you awake": better [目]{め}を[覚]{さ}まして or 起きてますか? I have a simple question: If I want to say "Are you awake?" is it better to translate it as **[]{}[]{}** or ****? It has to be intended as _Hey, you're walking... but are you really awake?_ Thank you.

"" is a request "Wake up!", because it ends with the te-form. It's not a question. To say "Are you awake?", you can form a question with the same set phrase, like "?" or "?" ( is transitive, is intransitive)

Likewise, "!" is "Wake up!", whereas "?" or "?" is "Are you awake?" In a casual conversation, "?" is the easiest expression.