wonderful, well-crafted and succinct.
this is a perfect little slice of a game. the theming is spot on, the visuals are perfectly appropriate without being distracting. i really enjoyed using 'hot spots' as the interaction method, though some were not so clear. and of course the overall meaning was well conveyed an poignant.
subtitles aren't even negotiable any more. they're pretty much as standard as visuals and audio, and assuming you wrote a script for your lines, that work should already be done anyway.
because everything is conveyed through audio, it can be tough to know when segments are done. in the very first room i thought the character was done speaking and walked away, before realizing i had to go back and listen again and let him finish to progress. easiest way to accommodate this is with maybe a little 'speaking' orb above the character's head as an indicator.
it might also be too subtle in some respects. maybe one or two more steps before the 'meaning' of each room is revealed with a little more buildup. but otherwise, all the necessary elements are there and it works well. amazing experience!