diff --git a/bin/back b/bin/back
index 444ac9b..15f3a0b 100755
Binary files a/bin/back and b/bin/back differ
diff --git a/obj/main.o b/obj/main.o
index 1a6d7a8..339dd80 100644
Binary files a/obj/main.o and b/obj/main.o differ
diff --git a/obj/menus.o b/obj/menus.o
index b18dbf2..b35fbe1 100644
Binary files a/obj/menus.o and b/obj/menus.o differ
diff --git a/src/main.c b/src/main.c
index 47c1729..a15460f 100644
--- a/src/main.c
+++ b/src/main.c
@@ -172,7 +172,7 @@ void processInput(GLFWwindow *window, float dtime) {
 
     // reset
     if(glfwGetKey(window, GLFW_KEY_R) == GLFW_PRESS) {
-        if(!rPress) {
+        if(!isMenuOpen() && !rPress) {
             rPress = true;
             reset_everything(7, "templates/");
         }   
@@ -246,11 +246,14 @@ int main_alt() {
     glCullFace(GL_FRONT); 
     glDepthFunc(GL_LESS);
 
+    //glfwSetMouseButtonCallback(window, mouse_button_callback);
+
     init_csts();
     init_hashtbl();
     init_ent_generator(10);
     init_proj();
     init_interf();
+    build_all_menus();
     parse_rooms(7, "templates/");
 
     // ---------------------------------------------------------------------------------------------------------------------------------------------- //
@@ -412,7 +415,7 @@ int main_alt() {
         gl_drawInteger(shaderProgramR, triCount, 0.0f, 0.92f, 0.04f, 128, 128, 128, 0.005f, 1);
         gl_drawData(shaderProgramR);
 
-        if(!isInMenu(shaderProgramR)) {
+        if(!isInMenu(window, shaderProgramR)) {
             processInput(window, delta);
             if(gamemode == 0) {
                 movePlayerG(delta);
diff --git a/src/menus.c b/src/menus.c
index 94a7f6c..b3f840d 100644
--- a/src/menus.c
+++ b/src/menus.c
@@ -356,7 +356,7 @@ static int MAX_INTERFACE_SIZE = 192;
 static int bListId;
 static int intListId;
 
-static int* current_interface = NULL;
+static int* current_interface;
 
 void display_button(int but_id, unsigned int fragShader) {
     if(but_id < 0 || but_id > bListId) {
@@ -392,44 +392,64 @@ bool is_button_pressed(int but_id, float mx, float my) {
     }
 }
 
-void menu_actions(int int_id) {
+void menu_actions(GLFWwindow *window, int int_id) {
+    printf("%d\n", glfwGetKey(window, GLFW_MOUSE_BUTTON_LEFT));
     if(int_id < 0 || int_id > intListId) {
         fprintf(stderr, "ERROR : attempting to update a non-existing interface (%d)\n", int_id);
-    } else if(false /* TODO : mouse is clicked */) {
-        float mx = 0.0f;
-        float my = 0.0f;
-        /* TODO : get mouse position and state */
+    } else if(
+        glfwGetKey(window, GLFW_MOUSE_BUTTON_LEFT) == GLFW_PRESS
+    ) {
+        double mx = 0.0;
+        double my = 0.0;
+        glfwGetCursorPos(window, &mx, &my);
+        mx = 2.0*mx/1500.0 -1.0;
+        my = 2.0*my/1000.0 -1.0;
+        //printf("EE %lf, %lf\n", mx, my);
+        //fflush(stdout);
         for(int k = 0; k < interfaceList[int_id].nButtons; k++) {
-            if(is_button_pressed(interfaceList[int_id].buttons[k], mx, my)) {
+            if(is_button_pressed(interfaceList[int_id].buttons[k], (float)mx, (float)my)) {
+                if(buttonList[interfaceList[int_id].buttons[k]].onClick != NULL) {
+                    (*buttonList[interfaceList[int_id].buttons[k]].onClick)(buttonList[interfaceList[int_id].buttons[k]].arg);
+                }
                 switch (buttonList[interfaceList[int_id].buttons[k]].type) {
-                case WARP:
-                    *current_interface = *buttonList[interfaceList[int_id].buttons[k]].metadata;
-                    break;
-                case SET_VAR:
-                    /* TODO */
-                    break;
-                case EXIT:
-                    current_interface = NULL;
-                    break;
-                
-                default:
-                    break;
+                    case WARP:
+                        *current_interface = *buttonList[interfaceList[int_id].buttons[k]].metadata;
+                        break;
+
+                    case NONE:
+                        break;
+
+                    case SET_VAR:
+                        /* TODO */
+                        break;
+
+                    case EXIT:
+                        *current_interface = -1;
+                        break;
+                    
+                    default:
+                        break;
                 }
             }
         }
     }
 }
 
-bool isInMenu(unsigned int fragShader) {
-    if(current_interface == NULL) {
+bool isInMenu(GLFWwindow *win, unsigned int fragShader) {
+    if(*current_interface == -1) {
         return false;
     } else {
+        //printf("displaying %d\n", *current_interface);
         display_interface(*current_interface, fragShader);
-        menu_actions(*current_interface);
+        menu_actions(win, *current_interface);
         return true;
     }
 }
 
+bool isMenuOpen() {
+    return (*current_interface != -1);
+}
+
 void init_interf() {
     buttonList = malloc(sizeof(onoff_button)*MAX_BUTTON_SIZE);
     for(int k = 0; k < MAX_BUTTON_SIZE; k++) {
@@ -441,10 +461,14 @@ void init_interf() {
     }
     bListId = 0;
     intListId = 0;
+    current_interface = malloc(sizeof(int));
+    *current_interface = -1;
 }
 
 // returns the ID of the new button (-1 if error)
-int button_create_onoff(char* text, int red, int green, int blue, float x, float y, float w, float h, button_action actn, int* val) {
+// actn can be within {NONE, WARP, SET_VAR, EXIT}
+// if actn is WARP or SET_VAR then val shall not be NULL
+int button_create_onoff(char* text, int red, int green, int blue, float x, float y, float w, float h, button_action actn, int* val, void (*onClick)(void*), void* arg) {
     if(bListId < MAX_BUTTON_SIZE) {
 
         buttonList[bListId].id = bListId;
@@ -461,6 +485,9 @@ int button_create_onoff(char* text, int red, int green, int blue, float x, float
         buttonList[bListId].type = actn;
         buttonList[bListId].metadata = val;
 
+        buttonList[bListId].onClick = onClick;
+        buttonList[bListId].arg = arg;
+
         bListId += 1;
         return (bListId-1);
     } else {
@@ -538,9 +565,23 @@ void interface_set(int interface_id) {
     *current_interface = interface_id;
 }
 
+/*
+
+*/
+// build and link everything here
+void build_all_menus() {
+    int welcome_start_b = button_create_onoff("start", 32, 255, 255, -0.25f, -0.25f, 0.5f, 0.5f, EXIT, NULL, NULL, NULL);
+    int welcome_start_i = interface_create("Welcome", 128, 128, 128, -0.4f, 0.7f, 0.8f, 0.25f);
+    //printf("%d %d\n", welcome_start_i, welcome_start_b);
+    interface_link_button(welcome_start_i, welcome_start_b);
+    interface_set(welcome_start_i);
+    //printf("------------- %d\n", *current_interface);
+}
+
 void free_interf() {
     free(buttonList);
     free(interfaceList);
+    free(current_interface);
 }
 
 /*
diff --git a/src/menus.h b/src/menus.h
index 8228be4..24d1b26 100644
--- a/src/menus.h
+++ b/src/menus.h
@@ -1,7 +1,7 @@
 #ifndef MENUS_H
 #define MENUS_H
 
-typedef enum button_action {WARP, SET_VAR, EXIT} button_action ;
+typedef enum button_action {NONE, WARP, SET_VAR, EXIT} button_action ;
 
 typedef struct onoff_button {
     int id;
@@ -15,6 +15,11 @@ typedef struct onoff_button {
     
     // the value to change (if SET_VAR) or the destination interface (if WARP)
     int* metadata;
+
+    // is called upon clicking button
+    // this function is executed before metadata is used
+    void (*onClick)(void* args);
+    void* arg;
 } onoff_button;
 
 typedef struct interface {
@@ -40,14 +45,17 @@ void gl_printf(unsigned int fragShader, float x, float y, float size, float widt
 
 void init_interf();
 
-bool isInMenu(unsigned int fragShader);
+bool isInMenu(GLFWwindow *win, unsigned int fragShader);
+bool isMenuOpen();
 
-int button_create_onoff(char* text, int red, int green, int blue, float x, float y, float w, float h, button_action actn, int* val);
+int button_create_onoff(char* text, int red, int green, int blue, float x, float y, float w, float h, button_action actn, int* val, void (*onClick)(void*), void* arg);
 int interface_create(char* title, int red, int green, int blue, float x, float y, float w, float h);
 void interface_link_button(int interface_id, int button_id);
 void interface_unlink_button(int interface_id, int button_id);
 void interface_set(int interface_id);
 
+void build_all_menus();
+
 void free_interf();
 
 #endif
\ No newline at end of file