I really, really enjoyed this game. I think it adds a lot to the VN style of presentation to include the hidden pictures elements in between long story pieces.
There were a few misspellings within the items that I noticed, but nothing that made it hard to understand what you were looking for.
I think you might need to extend your timer a little as well -- for people who aren't familiar with the puzzles / items, it's difficult to succeed in the first attempt (unless that was your intention, considering the theme of the contest, and obviously ignoring the initial puzzle where you're meant to lose to teach the player that mechanic). I often had to retry with one item remaining and then had to redo the entire puzzle, which was a bit disheartening. Even an additional 15-20 seconds would've been enough for me, personally, in most cases.
But, other than not particularly loving having to redo the puzzle if I didn't finish within the time limit, I thought this was an absolutely fantastic game. Very well done! :)