diff --git a/main.lua b/main.lua
index d6dc6ff..ad1dd8c 100644
--- a/main.lua
+++ b/main.lua
@@ -1,6 +1,7 @@
 --[[ LOVE STUFF ]]
 function love.load()
-  myWorld = love.physics.newWorld(0, 100)
+  myWorld = love.physics.newWorld(0, 500)
+  myWorld:setCallbacks(beginContact, endContact, preSolve, postSolve)
 
   sprites = {}
   sprites.coin_sheet = love.graphics.newImage('sprites/coin_sheet.png')
@@ -16,21 +17,28 @@ end
 
 function love.update(dt)
   myWorld:update(dt)
+  playerUpdate(dt)
 end
 
 function love.draw()
   love.graphics.draw(
-    sprites.player_stand,
-    player.body:getX(),
-    player.body:getY(),
-    nil, nil, nil,
-    sprites.player_stand:getWidth()/2, sprites.player_stand:getHeight()/2)
+      sprites.player_stand,
+      player.body:getX(),
+      player.body:getY(),
+      nil, nil, nil,
+      sprites.player_stand:getWidth()/2, sprites.player_stand:getHeight()/2)
 
   for i, p in ipairs(platforms) do
     love.graphics.rectangle("fill", p.body:getX(), p.body:getY(), p.width, p.height)
   end
 end
 
+function love.keypressed(key, scancode, isrepeat)
+  if key == "space" and player.grounded then
+    player.body:applyLinearImpulse(0, -2500)
+  end
+end
+
 
 function spawnPlatform(x, y, width, height)
   local platform = {}
@@ -42,3 +50,11 @@ function spawnPlatform(x, y, width, height)
 
   table.insert(platforms, platform)
 end
+
+
+function beginContact(a, b, coll)
+  player.grounded = true
+end
+function endContact(a, b, coll)
+  player.grounded = false
+end
diff --git a/player.lua b/player.lua
index bf146c6..999ca5e 100644
--- a/player.lua
+++ b/player.lua
@@ -1,4 +1,20 @@
 player = {}
+-- Physics Engine
 player.body = love.physics.newBody(myWorld, 100, 100, 'dynamic')
 player.shape = love.physics.newRectangleShape(66, 92)
 player.fixture = love.physics.newFixture(player.body, player.shape)
+--
+player.speed = 200
+player.grounded = false
+
+
+function playerUpdate(dt)
+
+  if love.keyboard.isDown('a') then
+    player.body:setX(player.body:getX() - player.speed * dt)
+  end
+
+  if love.keyboard.isDown('d') then
+    player.body:setX(player.body:getX() + player.speed * dt)
+  end
+end