diff --git a/mario/blocks.cpp b/mario/blocks.cpp
index 5049871..36e9e59 100644
--- a/mario/blocks.cpp
+++ b/mario/blocks.cpp
@@ -4,6 +4,7 @@
 #include "sprites.hpp"
 #include "editor_visitor.hpp"
 #include <unordered_map>
+#include "mario_visitor.hpp"
 
 MarioBlock::MarioBlock( int x, int y,
                         std::shared_ptr< SDLPP::Renderer > renderer,
@@ -22,7 +23,7 @@ void MarioBlock::visit( SDLPP::Visitor &visitor ) {
          visitor.getVisitorType() == VisitorType::Modifier ) {
         destroy();
     }
-    if(visitor.getFromId() == MARIO_TOP_DETECT && _destructible) {
+    if(visitor.getFromId() == MARIO_TOP_DETECT && _destructible && dynamic_cast<MarioVisitor&>(visitor).canDestroy()) {
         destroy();
     }
     visitor.visit( *this );
diff --git a/mario/main.cpp b/mario/main.cpp
index 91f745d..102f79d 100644
--- a/mario/main.cpp
+++ b/mario/main.cpp
@@ -119,7 +119,7 @@ void doInput( std::shared_ptr< SDLPP::Scene > scene ) {
         pollEvents( *scene );
         auto prevPos = mario->getDoubleRect().first;
         scene->updateScene();
-        MarioVisitor mv{};
+        MarioVisitor mv(mario->getMovement().getY() < 0);
         scene->visitCollisions( *mario, mv );
         if ( mv.isDead() ) {
             quit = true;
diff --git a/mario/mario.cpp b/mario/mario.cpp
index a07f3e4..5249f6b 100644
--- a/mario/mario.cpp
+++ b/mario/mario.cpp
@@ -14,11 +14,15 @@ Mario::Mario(const std::shared_ptr< SDLPP::Renderer > &renderer) : SDLPP::Rectan
     addCollision(
         SDLPP::RectColider( 0.21, 0.85, 0.65, 0.25, MARIO_FLOOR_DETECT ) );
     addCollision(
-        SDLPP::RectColider( 0, 0.1, 0.1, 0.8, MARIO_LEFT_SIDE_DETECT ) );
+        SDLPP::RectColider( 0.05, 0.1, 0.1, 0.8, MARIO_LEFT_SIDE_DETECT ) );
     addCollision(
-        SDLPP::RectColider( 0.9, 0.1, 0.1, 0.8, MARIO_RIGHT_SIDE_DETECT ) );
+        SDLPP::RectColider( 0.85, 0.1, 0.1, 0.8, MARIO_RIGHT_SIDE_DETECT ) );
     addCollision(
-        SDLPP::RectColider( 0.45, 0, 0.1, 0.15, MARIO_TOP_DETECT ) );
+        SDLPP::RectColider( 0.05, 0, 0.1, 0.1, MARIO_TOP_LEFT_DETECT ) );
+    addCollision(
+        SDLPP::RectColider( 0.85, 0, 0.1, 0.1, MARIO_TOP_LEFT_DETECT ) );
+    addCollision(
+        SDLPP::RectColider( 0.35, 0, 0.3, 0.15, MARIO_TOP_DETECT ) );
     setStatic( false );
 }
 void Mario::walkLeft() {
@@ -48,19 +52,8 @@ void Mario::setStanding() {
 }
 
 void Mario::handleVisitor(MarioVisitor &visitor, SDLPP::Vec2D<double> previous_position) {
+    // TODO - https://web.archive.org/web/20130807122227/http://i276.photobucket.com/albums/kk21/jdaster64/smb_playerphysics.png
     // handle gravity
-    // TODO - https://haydnscarlett.wordpress.com/2020/07/30/marios-jump/
-/*    if (jumping) {
-        if(stop_jump && getPos().getY() - min_jump < 0.05) {
-            jumping = false;
-            resetMovementY();
-        } else if( getPos().getY() - max_jump < 0.05 ) {
-            jumping = false;
-            resetMovementY();
-        } else if ( getPos().getY() - slow_jump < 0.05 && getMovement().getY() < -1*jump_movement/5 ) {
-            addMovement(0, jump_movement/50);
-        }
-    }*/
     on_ground = visitor.isOnGround();
     if(!jumping && on_ground) {
         resetMovementY();
@@ -75,12 +68,19 @@ void Mario::handleVisitor(MarioVisitor &visitor, SDLPP::Vec2D<double> previous_p
     }
     if(visitor.topBlock() && getMovement().getY() < 0) {
         resetMovementY();
+        stop_jump = true;
     }
     // make sure Mario isn't stuck inside a wall
-    if ( visitor.isStopped() ||
-         ( !visitor.canGoLeft() && previous_position.getX() > getPos().getX() ) ||
-         ( !visitor.canGoRight() && previous_position.getX() < getPos().getX() ) ) {
+    // TODO more readable function names
+    if ( visitor.isStopped() || !visitor.canGoLeft() || !visitor.canGoRight() ) {
         setPos( previous_position.getX(), getPos().getY() );
+    } else if (visitor.moveTop() && (jumping && !stop_jump)) {
+        auto objPos = visitor.getRightLeftPos();
+        if(objPos.getX() < getPos().getX()) {
+            setPos( objPos.getX() + BLOCK_SIZE, getPos().getY() );
+        } else {
+            setPos( objPos.getX() - BLOCK_SIZE, getPos().getY() );
+        }
     }
 }
 
diff --git a/mario/mario_visitor.cpp b/mario/mario_visitor.cpp
index 7d12a5f..6991538 100644
--- a/mario/mario_visitor.cpp
+++ b/mario/mario_visitor.cpp
@@ -17,6 +17,9 @@ void MarioVisitor::visit( const SDLPP::RenderObject &obj ) {
             right = true;
         } else if (from == MARIO_TOP_DETECT) {
             top_hit = true;
+        } else if (from == MARIO_TOP_LEFT_DETECT || from == MARIO_TOP_RIGHT_DETECT) {
+            rightleftpos = obj.getPos();
+            top_left_right = true;
         }
         break;
     case DEATH_ID:
diff --git a/mario/mario_visitor.hpp b/mario/mario_visitor.hpp
index 34ab124..4355c2f 100644
--- a/mario/mario_visitor.hpp
+++ b/mario/mario_visitor.hpp
@@ -6,7 +6,7 @@
 
 class MarioVisitor : public SDLPP::Visitor {
 public:
-    MarioVisitor() {}
+    MarioVisitor(bool is_jumping) : jumping(is_jumping) {}
     virtual void visit( const SDLPP::RenderObject &obj ) override;
     bool isOnGround() {
         return onGround;
@@ -44,6 +44,16 @@ public:
     bool topBlock() {
         return top_hit;
     }
+    bool moveTop() {
+        return top_left_right;
+    }
+    const SDLPP::Vec2D<double> &getRightLeftPos() {
+        return rightleftpos;
+    }
+
+    bool canDestroy() {
+        return jumping && !top_hit;
+    }
 
 private:
     bool onGround = false;
@@ -56,6 +66,9 @@ private:
     bool right = false;
     uint64_t _type = 0;
     bool top_hit = false;
+    SDLPP::Vec2D<double> rightleftpos;
+    bool top_left_right = false;
+    bool jumping;
 };
 
 #endif
diff --git a/mario/objectids.hpp b/mario/objectids.hpp
index 46d5151..8b4218f 100644
--- a/mario/objectids.hpp
+++ b/mario/objectids.hpp
@@ -74,6 +74,8 @@
 #define MARIO_LEFT_SIDE_DETECT 0x2002
 #define MARIO_RIGHT_SIDE_DETECT 0x2003
 #define MARIO_TOP_DETECT 0x2004
+#define MARIO_TOP_LEFT_DETECT 0x2005
+#define MARIO_TOP_RIGHT_DETECT 0x2006
 
 #define EDITOR_EDIT_SQUARE 0xF001
 #define EDITOR_MOUSE_ID 0xF002