So I put all the controls in the description.
It's really interesting that people that played the game before I added that note about controls for dimension's size, did not complain. But all the players after I put it did.
So if I should remember one thing: either I put ALL the controls, or NONE. Because as soon as you put some of it, players will think that there is nothing more. And of course it makes sense that they (and I would too) think that way. Thanks for the feedback !