The merfolk kid was small enough that it would make anyone wonder just how he had gotten in here. Especially since it was clear that he was not able to move around the wall without the help of the golem that was moving and lifting him where he wanted to be.
This also would raise more questions. How exactly had a child been drawing all this? How had a child gotten a golem like that? How was all this actually happening since there was a clear separation from the other rooms?
Instead, Walker was thinking about other things.
"Who is this? You came in here without even bothering to knock. You should know that this is my room and I am making something way better than whatever you think you need space for. So get out."