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diff --git a/src/player.hpp b/src/player.hpp
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+/**
+ * @file player.hpp
+ * Manages player input.
+ *
+ * Copyright (C) 2019 Clyne Sullivan
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef PLAYERSYSTEM_HPP_
+#define PLAYERSYSTEM_HPP_
+
+#include <SDL2/SDL.h>
+#include <entityx/entityx.h>
+
+#include "components/Player.hpp"
+#include "input.hpp"
+
+/**
+ * @class PlayerSystem
+ * Controls player entity movement.
+ */
+class PlayerSystem : public entityx::System<PlayerSystem>,
+	public entityx::Receiver<PlayerSystem>
+{
+    private:
+	/**
+	 * Defines player's horizontal movement velocity.
+	 */
+        constexpr static double GROUND_VELOCITY = 100;
+
+	entityx::Entity player;
+
+    public:
+        /**
+         * Prepares the system for running.
+         */
+        void configure([[maybe_unused]] entityx::EntityManager& entities,
+                       entityx::EventManager& events) final;
+
+        /**
+         * Updates the scripting system.
+         */
+        void update([[maybe_unused]] entityx::EntityManager& entites,
+                    [[maybe_unused]] entityx::EventManager& events,
+                    [[maybe_unused]] entityx::TimeDelta dt) final;
+
+	/**
+	 * Captures the player entity.
+	 */
+	void receive(const entityx::ComponentAddedEvent<Player>& cae);
+
+	/**
+	 * Invalidates the system's player entity (assume player is gone).
+	 */
+	void receive(const entityx::ComponentRemovedEvent<Player>& cre);
+
+	/**
+	 * Applies velocity based on key press.
+	 */
+	void receive(const KeyDownEvent& kue);
+
+	/**
+	 * Removes applied velocity
+	 */
+	void receive(const KeyUpEvent& kue);
+};
+
+#endif // PLAYERSYSTEM_HPP_