Dear developer, be honest with me, is there a Holyday Island? Or did you just thought: Why should I programm it? It is impossible to reach it in a human life span so why bother :-D
As the other ones say, this game needs a level display. Should be easy to create. The other thing, also already mentioned, is that you can barely see where one cluster of blocks ends and the next one begins, I advise you to fix this soon, it will improve the quality of your game sustainably. The difficuilty is balanced fine, challenging but not (quite) impossible like other puzzle games. All in all 4/5 (when the problems are solved)
@ Kongregate: I don´t want to be rude or unthankful, but why does it take so much time badging these games? It should be (nearly) the same game engine and there is always the same goal -> solving the case^^
By the way, great game series :-)
The wait is over! I'm a bit behind on the queue right now, but I'm catching up here.