This is a charming little game. It's beautiful and the characters are fairly unique. However, if you are a point-and-click adventure purist, you'll probably be turned off by it. Just look at the top reviews. I agree with many of the sentiments, but I still feel like this was a good game. I only recommend getting this game while it's on sale.
In the first part of the game, the puzzles are fairly easy to solve. I was glad about this as I usually get stuck early on with other P&C games. However, as the game progresses, the puzzles get weird. Many of them require A LOT of experimentation just to determine the function and mechanics of everything, especially with the goggles. Normally this wouldn't be a big deal, but you have to wait for Lilly to perform each action, including moving from one point to another. Much of the time logged in the game is waiting for action execution. The objective isn't always clear. Even if you can figure out what everything does, you might not know what you're supposed to be doing. The underwater bells were maddening, and I ended up using a walkthrough.
The game itself is a mystery. The description doesn't help. It says that the ultimate mystery would be unlocked, but that doesn't happen. I'm left with questions. What world is this? Where are all the other people? Why is the curtain magical? What is with the ending? Basically, the whole plot is missing except for Lilly trying to rescue her brother. The only reason I don't really complain is because I enjoyed the journey.
It is short. It only takes a few hours to complete. I'm sure that many of the scenes could've been utilized further without overcomplicating it. If nothing else, use them to add some backstory to the world or provide a simple reaction to being clicked. A few things did the latter, such as a locked door, but it could've been done more. Even though the game is short, I'm okay with it. I don't have a lot of time to game, so I like being able to complete certain games in an evening or two.
Yes, the game has its shortcomings, but it's still fun.