diff --git a/inc/App.hpp b/inc/App.hpp
index 2c0ce3f..440c132 100644
--- a/inc/App.hpp
+++ b/inc/App.hpp
@@ -23,4 +23,5 @@ private:
   Vector2 mouseStart;
   float len;
   float ofset;
+  bool validHit = false;
 };
diff --git a/src/App.cpp b/src/App.cpp
index 483c04a..5498ce0 100644
--- a/src/App.cpp
+++ b/src/App.cpp
@@ -29,11 +29,12 @@ void App::update()
   if (IsMouseButtonPressed(MOUSE_BUTTON_LEFT))
   {
     mouseStart = GetMousePosition();
+    validHit = CheckCollisionPointRec(mouseStart, destA);
     len = Vector2Distance(mouseStart, {destB.x, destB.y});
     ofset = std::atan2(destB.x - mouseStart.x, destB.y - mouseStart.y);
   }
 
-  if (IsMouseButtonDown(MOUSE_BUTTON_LEFT))
+  if (IsMouseButtonDown(MOUSE_BUTTON_LEFT) && validHit)
   {
     Vector2 mousePosition = GetMousePosition();
     float dist = mousePosition.x - mouseStart.x;
@@ -44,7 +45,7 @@ void App::update()
     destA.y = newCenter.y + mousePosition.y;
   }
 
-  if (IsMouseButtonReleased(MOUSE_BUTTON_LEFT))
+  if (IsMouseButtonReleased(MOUSE_BUTTON_LEFT) && validHit)
   {
     canvases[1 - pos].newGen();
     pos = 1 - pos;