I'm birtrosz, the creator of this puzzle
It was inspired by all the HTML-based puzzle games (Zed, Cipher, P4X riddle, Neutral riddle, etc.)
List of many other cool riddle games similiar to this one can be found here: enigmatics

Most images created by me except:

Special thanks to:
umsyt - being the first solver of the first temp end and making the game popular
MishuAnubis - void branch entrance idea, some nice easter egg ideas, and creating the nordinho thread
And all of you for playing my puzzle :)