diff --git a/fcore/game-type.sml b/fcore/game-type.sml
index 516af6b..9addadd 100644
--- a/fcore/game-type.sml
+++ b/fcore/game-type.sml
@@ -23,6 +23,8 @@ sig
 
   type defeated_enemies = {angle: int}
 
+  type player_projectile = {x: int, y: int}
+
   type player =
     { yAxis: player_y_axis
     , xAxis: player_x_axis
@@ -57,6 +59,8 @@ sig
 
   type game_type =
     { player: player
+    , playerProjectiles: player_projectile vector
+    , playerProjectileTree: QuadTree.t
     , walls: wall vector
     , wallTree: QuadTree.t
     , platforms: platform vector
@@ -94,6 +98,8 @@ struct
 
   type defeated_enemies = {angle: int}
 
+  type player_projectile = {x: int, y: int}
+
   type player =
     { yAxis: player_y_axis
     , xAxis: player_x_axis
@@ -128,6 +134,8 @@ struct
 
   type game_type =
     { player: player
+    , playerProjectiles: player_projectile vector
+    , playerProjectileTree: QuadTree.t
     , walls: wall vector
     , wallTree: QuadTree.t
     , platforms: platform vector
@@ -171,6 +179,8 @@ struct
       val enemyTree = Enemy.generateTree enemies
     in
       { player = player
+      , playerProjectileTree = QuadTree.empty
+      , playerProjectiles = Vector.fromList []
       , walls = walls
       , wallTree = wallTree
       , platforms = platforms
diff --git a/fcore/game-update.sml b/fcore/game-update.sml
index 0a5e6a3..9049fd3 100644
--- a/fcore/game-update.sml
+++ b/fcore/game-update.sml
@@ -98,7 +98,7 @@ struct
 
             (* add collided enemies to player record, 
              * concatenating with the previous enemies defeated *)
-            val newDefeated = 
+            val newDefeated =
               Vector.map (fn id => {angle = 360}) enemyCollisions
 
             val oldDefeated = #enemies player
@@ -150,8 +150,17 @@ struct
 
   fun update (game, input) =
     let
-      val {player, walls, wallTree, platforms, platformTree, enemies, enemyTree} =
-        game
+      val
+        { player
+        , playerProjectileTree
+        , playerProjectiles
+        , walls
+        , wallTree
+        , platforms
+        , platformTree
+        , enemies
+        , enemyTree
+        } = game
 
       val player = Player.runPhysicsAndInput (game, input)
 
@@ -162,6 +171,8 @@ struct
       val enemyTree = Enemy.generateTree enemies
     in
       { player = player
+      , playerProjectiles = playerProjectiles
+      , playerProjectileTree = playerProjectileTree
       , walls = walls
       , wallTree = wallTree
       , platforms = platforms