I have noticed that some people get a blue filter instead of the normal green filter. While I don't know what causes it exactly, I do have somethings you can try. 

1: Close the game and relaunch it

2: Redownload the game 

3: Redownload the game from the other site (in this case,  the gamejolt page )

If non of these work, LET ME KNOW in the comments section  (that is one of the things it is for) and i will ask some questions about the issue. 

Thanks! :)