diff --git a/collisionDetection.c b/collisionDetection.c
index 44a7440..686f0f0 100644
--- a/collisionDetection.c
+++ b/collisionDetection.c
@@ -1,4 +1,5 @@
 #include <world.h>
+#include <string.h>
 struct CollisionEvent collisionDetect(int objYpos, int objXpos){
 	int i;
 	for(i=1; i<MAX_ENTITIES; i++){
@@ -17,7 +18,20 @@ struct CollisionEvent collisionDetect(int objYpos, int objXpos){
 			}
 		}
 	}
-	struct CollisionEvent collisionEvent = {.collidedWithItem=0,.collidedWithEntity=0};
+	
+	for(i=0; i<strlen(unpassableChars); i++){
+		if (mvwinch(viewportWin,objYpos,objXpos)==unpassableChars[i]){
+			struct CollisionEvent collisionEvent = {.collidedWithUnPassableChar=1};
+			return collisionEvent;
+		}
+	}
+	
+	if(objYpos < 1 || objYpos > viewportWinRows-2 || objXpos < 1 || objXpos > viewportWinCols-2 ){
+			struct CollisionEvent collisionEvent = {.collidedWithBoundary=1};
+			return collisionEvent;
+	}
+
+	struct CollisionEvent collisionEvent = {.collidedWithItem=0,.collidedWithEntity=0,.collidedWithUnPassableChar=0,.collidedWithBoundary=0};
 	return collisionEvent;
 }
 
diff --git a/drawWindows.c b/drawWindows.c
index 726c1f0..ee07f70 100644
--- a/drawWindows.c
+++ b/drawWindows.c
@@ -4,6 +4,9 @@
 #include <weaponsSystem.h>
 
 void drawViewport(){
+	mvwprintw(viewportWin,10,10,"++++");
+	mvwprintw(viewportWin,11,10,"+  +");
+	mvwprintw(viewportWin,12,10,"+  +");
 	int i;
 	for(i=0; i<MAX_ITEMS; i++){
 		if(allItems[i].isAlive){
@@ -25,14 +28,9 @@ void drawViewport(){
 		else if(mvwinch(viewportWin,allProjectiles[i].curYpos,allProjectiles[i].curXpos)==allProjectiles[i].symbol){
 			mvwaddch(viewportWin, allProjectiles[i].curYpos, allProjectiles[i].curXpos, ' ');
 		}
-		checkProjectileCollision(&allProjectiles[i]);
 		if(mvwinch(viewportWin,allProjectiles[i].prevYpos, allProjectiles[i].prevXpos)==allProjectiles[i].symbol){
 			mvwaddch(viewportWin, allProjectiles[i].prevYpos, allProjectiles[i].prevXpos, ' ');
 		}	
-		if(allProjectiles[i].distanceTraveled>=allProjectiles[i].range || allProjectiles[i].curYpos > viewportWinRows || allProjectiles[i].curYpos < 0 || allProjectiles[i].curXpos > viewportWinCols || allProjectiles[i].curXpos < 0){
-			allProjectiles[i].isAlive=0;
-			mvwaddch(viewportWin, allProjectiles[i].curYpos, allProjectiles[i].curXpos, ' ');
-		}
 	}
 	box(viewportWin,0,0);
 	wnoutrefresh(viewportWin);
diff --git a/gameLoop.c b/gameLoop.c
index 2671d42..248c55e 100644
--- a/gameLoop.c
+++ b/gameLoop.c
@@ -17,16 +17,19 @@ void gameLoop(){
 		switch(ch){
 			case 'w':
 			case 'W':{
-				if(allEntities[0].curYpos > 1){
+				struct CollisionEvent collisionEvent = collisionDetect(allEntities[0].nextYpos-1,allEntities[0].curXpos);
+				if(!collisionEvent.collidedWithUnPassableChar && !collisionEvent.collidedWithBoundary){
 					allEntities[0].nextYpos--;
-					if(allEntities[0].nextYpos < 0){
-						allEntities[0].nextYpos = 0;
-					}
-				}
+				};
 				break;
 			}
 			case 's':	
 			case 'S':{
+				struct CollisionEvent collisionEvent = collisionDetect(allEntities[0].nextYpos+1,allEntities[0].curXpos);
+				if(!collisionEvent.collidedWithUnPassableChar && !collisionEvent.collidedWithBoundary){
+					allEntities[0].nextYpos++;
+				};
+				break;
 				if(allEntities[0].curYpos < viewportWinRows - 2){
 					allEntities[0].nextYpos++;
 					if(allEntities[0].nextYpos > viewportWinRows-1){
@@ -37,6 +40,11 @@ void gameLoop(){
 			}
 			case 'a':
 			case 'A':{
+				struct CollisionEvent collisionEvent = collisionDetect(allEntities[0].curYpos,allEntities[0].nextXpos-1);
+				if(!collisionEvent.collidedWithUnPassableChar && !collisionEvent.collidedWithBoundary){
+					allEntities[0].nextXpos--;
+				};
+				break;
 				if(allEntities[0].curXpos > 1){
 					allEntities[0].nextXpos--;
 					if(allEntities[0].nextXpos < 0){
@@ -47,6 +55,11 @@ void gameLoop(){
 			}
 			case 'd':
 			case 'D':{
+				struct CollisionEvent collisionEvent = collisionDetect(allEntities[0].curYpos,allEntities[0].nextXpos+1);
+				if(!collisionEvent.collidedWithUnPassableChar && !collisionEvent.collidedWithBoundary){
+					allEntities[0].nextXpos++;
+				};
+				break;
 				if(allEntities[0].curXpos < stdscrCols-2){
 					allEntities[0].nextXpos++;
 					if(allEntities[0].nextXpos > viewportWinCols-1){
diff --git a/initializeWorld.c b/initializeWorld.c
index e53cbc9..3221f90 100644
--- a/initializeWorld.c
+++ b/initializeWorld.c
@@ -18,6 +18,9 @@ void initializeWorld() {
 	struct Entity player = {.type="player",.symbol='@', .curYpos=1, .curXpos=1, .nextYpos=1, .nextXpos=1 ,.isAlive=1};
 	struct Weapon pistol = {.type="Pistol", .isAlive=1, .range=3, .maxCapacity=12, .curCapacity=12, .symbols="-\\|/-\\|/"};
 
+	passableChars="#";
+	unpassableChars="+\\|";
+	
 	viewportWinRows = 21;
 	viewportWinCols = 87;
 	scoreWinRows = 7;
diff --git a/structs.h b/structs.h
index 284e61d..d6ae60f 100644
--- a/structs.h
+++ b/structs.h
@@ -35,6 +35,7 @@ struct Item{
 	int curXpos;
 };
 
+
 struct Projectile{
 	int isAlive;
 	char symbol;
@@ -52,6 +53,8 @@ struct Projectile{
 struct CollisionEvent{
 	struct Entity * collidedWithEntity;
 	struct Item * collidedWithItem;
+	int collidedWithUnPassableChar;
+	int collidedWithBoundary;
 };
 
 #endif
diff --git a/weaponsSystem.c b/weaponsSystem.c
index 32995ea..1f15de5 100644
--- a/weaponsSystem.c
+++ b/weaponsSystem.c
@@ -7,6 +7,7 @@ void moveProjectiles(){
 		if(allProjectiles[i].isAlive){
 			allProjectiles[i].prevYpos=allProjectiles[i].curYpos;
 			allProjectiles[i].prevXpos=allProjectiles[i].curXpos;
+			checkProjectileCollision(&allProjectiles[i]);
 			switch(allProjectiles[i].direction){
 				case 'w':{
 					allProjectiles[i].curYpos--;
@@ -30,6 +31,9 @@ void moveProjectiles(){
 
 			}
 			allProjectiles[i].distanceTraveled++;
+			if(allProjectiles[i].distanceTraveled>=allProjectiles[i].range || allProjectiles[i].curYpos > viewportWinRows || allProjectiles[i].curYpos < 0 || allProjectiles[i].curXpos > viewportWinCols || allProjectiles[i].curXpos < 0){
+				allProjectiles[i].isAlive=0;
+			}
 		}
 	}
 }
diff --git a/world.h b/world.h
index 6509449..29b3d30 100644
--- a/world.h
+++ b/world.h
@@ -28,4 +28,6 @@ struct Projectile allProjectiles[MAX_PROJECTILES];
 int zombieModifier;
 int itemModifier;
 
+char *passableChars,*unpassableChars;
+
 #endif
diff --git a/zombies.c b/zombies.c
index fde94e8..ae68402 100644
--- a/zombies.c
+++ b/zombies.c
@@ -31,17 +31,17 @@ void moveZombies(){
 				getNextPos(allEntities[i].curYpos,allEntities[i].curXpos,allEntities[0].curYpos,allEntities[0].curXpos);
 				allEntities[i].nextYpos = nextPos.y;
 				allEntities[i].nextXpos = nextPos.x;
-		
-				char charAtNextPos=mvwinch(viewportWin,allEntities[i].nextYpos,allEntities[i].nextXpos);
-				if(charAtNextPos!='@' && charAtNextPos!=' '){
-						allEntities[i].nextYpos = allEntities[i].curYpos;
-						allEntities[i].nextXpos = allEntities[i].curXpos;
-				}	
-				
-				if(allEntities[i].nextYpos < 1 || allEntities[i].nextYpos>viewportWinRows-2){
+
+				struct CollisionEvent collisionEvent = collisionDetect(allEntities[i].nextYpos,allEntities[i].nextXpos);
+								
+				if(collisionEvent.collidedWithBoundary || collisionEvent.collidedWithUnPassableChar || collisionEvent.collidedWithItem || collisionEvent.collidedWithEntity){
+						if(collisionEvent.collidedWithEntity){
+							if(collisionEvent.collidedWithEntity->type,"zombie"){
+								allEntities[i].nextYpos = allEntities[i].curYpos;
+								allEntities[i].nextXpos = allEntities[i].curXpos;
+							}
+						}
 						allEntities[i].nextYpos = allEntities[i].curYpos;
-				}
-				if(allEntities[i].nextXpos < 1 || allEntities[i].nextXpos>viewportWinCols-2){
 						allEntities[i].nextXpos = allEntities[i].curXpos;
 				}
 			}