Alright. I did. I do.
The past-bubbles are fun to use as well as technically impressive. I'm not sure about the glasses taking up the whole middle of the screen when in use, but the alternatives I came up with are worse (using a quarter of the screen in a corner or the whole thing).
The boulder got me.
I did feel like I was missing a backstory, with the treasures already there in the chest and the main character's name being prefixed in subtitles (like other characters were going to talk at some point), but I actually liked that too.
Fuckin' 5/6 pieces of art, though. Collectables always pull this shit on me. I may have another go to find it.