I'm sorry that I'm still continuing about the dependencies, but I just tried to compile the program myself with just lbsdl1.2 and lbsdl-ttf2.0 as dependencies and libsdl1.2-dev (and debhelper of course) as build-dependency. The engine compiled just fine and it works well too. This means that sudser isn't really needed at all (and neither is rootsh, I even removed it too to be sure root access isn't needed). I attached my modified debian/control if you want to take a look at it.