diff --git a/Makefile b/Makefile
index 6ef791b..04919ba 100644
--- a/Makefile
+++ b/Makefile
@@ -4,7 +4,8 @@ SRC=src/main.c \
     src/world.c \
     src/player.c \
     src/physics.c \
-    src/render.c
+    src/render.c \
+    src/collision.c\
 
 OUT=wrldbox
 
diff --git a/src/collision.c b/src/collision.c
index 480af6b..6d10ab1 100644
--- a/src/collision.c
+++ b/src/collision.c
@@ -4,5 +4,36 @@
 #include "collision.h"
 
 void checkCollision(){
-    for(int i; s)
+    float playerx=0.0;
+    float playery=0.0;
+    float plrsize=0.0;
+    for (int i = 0; i < MAX_ENTITIES; i++){
+        Entity *e = &entities[i];
+
+        if (!e->active)
+            continue;
+        if(e->isPlayer == false){
+            float objposx=e->position.x;
+            //float objposy=e->position.y;
+            float objsize=e->size;
+
+            if(playerx-(plrsize/2)<objposx+(objsize/2) && playerx-(plrsize/2)>objposx-(objsize/2)){
+                ApplyForce(
+                    e,
+                    (Vector2){1000, 1000}
+                );
+                ApplyForce(
+                    player,
+                    (Vector2){-1000, 1000}
+                );
+            }
+        }
+        else{
+            playerx=e->position.x;
+            playery=e->position.y;
+            if(playery==playery)
+
+            plrsize=e->size;
+        }
+    }
 }
diff --git a/src/collision.h b/src/collision.h
new file mode 100644
index 0000000..3f919e6
--- /dev/null
+++ b/src/collision.h
@@ -0,0 +1,8 @@
+#ifndef COLLISION_H
+#define COLLISION_H
+
+// FUNction declaration! yay!!!
+// run by main.c constantly to allow player input.
+void checkCollision();
+
+#endif
diff --git a/src/main.c b/src/main.c
index f4a9fc0..ebadd21 100644
--- a/src/main.c
+++ b/src/main.c
@@ -78,6 +78,7 @@ int main(void)
         {
             // allow player to be controlled, fit everything within the size of the screen
             UpdatePlayerControls();
+            checkCollision();
             UpdateEntities(dt, screenWidth);
 
             simTime += dt;
diff --git a/wrldbox b/wrldbox
index 3bba57c..1df3f3f 100755
Binary files a/wrldbox and b/wrldbox differ