what's supposed to be the difference between this and the other 7 free games on sites like kongregate?

In game it says devember 2015, would it be possible to have a more precise date ?

help me i want to get this game but the download button is no available for some reason how do i get the game please someone help

Upcoming DLC or free upgrade?

The star is supposed to be on the rainbow obviously (saw it in every walkthrough) but nothing happens when I click on the rainbow. It isn't even shown for me. Does anyone know where it's supposed to be or if it's a bug? I'd love to collect every star though. Thank you in advance https://i.imgur.com/jo6Cxoi.png...