This one's got the production value of an experienced team, and it shows. That also means that I am holding it to a higher standard than most submissions.
My first nitpick is the key swing. It's not done well, and it is a glaring blemish on what would otherwise be a masterpiece of a splash screen. A buddy was with me as well at the time, and referred to what was happening in the chest as "Photoshop Animation," but this criticism is hardly noticeable if at all to an untrained eye like myself.
Stealth games demand patience, and I really hated starting at the beginning after every mistake. My patience very quickly ran out, and I would get caught just going through the motions and trying to get back to where I was. I guess I could also just 'git gud'.
Voice Acting is always an appreciable addition, just adds to the flavor and personality of the sprite. It's done competently and cleanly, something I aspire to be able to do.
This game is strong, very strong indeed, but you are far from invincible.