Wow, this level is better than I thought! I've upped my rating to 4 stars! I played it again and found all the stars I'd missed. Some of the best hidden stars I've seen in a game - you can play it and not see 2 of them at all - unless you look hard enough.
... @ohmytian nice you got troubled from a simple level. sometime, challenge not always from solving not obvious logic paths.
@Ray Aznable Spoiler Well, in my opinion, finding HIDDEN stars was not fun compared to solving not obvious logic paths. If I can't see the logic paths, then I can get a hint/watch a video for help. But if I can't find a HIDDEN star, then I will be frustrated and delete the card (There's no point in hiding a star) . Thanks to the author as the stars as still visible at a specific angle and the routes to the stars in this level are very linear.
I saw, that I have to collect 4 stars... But only saw 2... I spent some moments to find the both... Then it was a smooth walk through...