Reset controller after each tick

common/src/sys/cleanup.rs

@@ -0,0 +1,15 @@
+use crate::comp::Controller;
+use specs::{Entities, Join, System, WriteStorage};
+use vek::*;
+
+/// This system will allow NPCs to modify their controller
+pub struct Sys;
+impl<'a> System<'a> for Sys {
+    type SystemData = (Entities<'a>, WriteStorage<'a, Controller>);
+
+    fn run(&mut self, (entities, mut controllers): Self::SystemData) {
+        for controller in (&mut controllers).join() {
+            *controller = Controller::default();
+        }
+    }
+}