added multi_menu

src/Game.cpp

@@ -109,7 +109,6 @@ namespace ZL
 			spaceGameStarted = 1;
 			};
 
-
 		menuManager.onMultiplayerPressed = [this]() {
 #ifdef NETWORK
 #ifdef EMSCRIPTEN

src/UiManager.cpp

@@ -906,22 +906,28 @@ namespace ZL {
 	}
 
 	void UiManager::onMouseUp(int x, int y) {
+		std::vector<std::shared_ptr<UiButton>> clicked;
+
 		for (auto& b : buttons) {
+			if (!b) continue;
 			bool contains = b->rect.contains((float)x, (float)y);
+
 			if (b->state == ButtonState::Pressed) {
 				if (contains && pressedButton == b) {
-					if (b->onClick) {
-						b->onClick(b->name);
-					}
+					clicked.push_back(b);
 				}
 				b->state = contains ? ButtonState::Hover : ButtonState::Normal;
 			}
 		}
-		pressedButton.reset();
 
-		if (pressedSlider) {
-			pressedSlider.reset();
+		for (auto& b : clicked) {
+			if (b->onClick) {
+				b->onClick(b->name);
+			}
 		}
+
+		pressedButton.reset();
+		if (pressedSlider) pressedSlider.reset();
 	}
 
 	void UiManager::onKeyPress(unsigned char key) {