First demo commit.

src/systems/AISystem.lua

@@ -0,0 +1,26 @@
+local AISystem = tiny.processingSystem(class "AISystem")
+
+function AISystem:init(target)
+    self.target = target
+end
+
+AISystem.filter = tiny.requireAll("ai", "pos", "platforming")
+
+function AISystem:process(e, dt)
+    if not self.target then 
+        return 
+    end
+    local targetx = self.target.pos.x
+    local pos = e.pos
+    local p = e.platforming
+    p.moving = self.target.isAlive
+    if targetx > pos.x then
+        p.direction = 'r'
+    end
+    if targetx < pos.x then
+        p.direction = 'l'
+    end
+    p.jumping = math.random() < 0.5 * dt
+end
+
+return AISystem