It's cool that the game fulfills the theme which is building the wall to protect the base, but as others said, the base is too small and after stacking the wall above the base, all you have to do is just wait until you can rebuild the wall again.
I know that I could've added it, but I was working on multiple games so I only spent at least 1 - 2 hours a day working on this game, so I couldn't think of a way to add this before the game jam ended. I'll work on it though :)