diff --git a/README.md b/README.md
index 8a24c33..83c28f7 100644
--- a/README.md
+++ b/README.md
@@ -24,8 +24,8 @@ If you want to know more details about the generation and classification of poly
 - MARATHON : clear 200 lines with increasing gravity!
 - ULTRA : scores as much as possible in only 2 minutes!
 - MASTER : clear 200 lines at levels higher than maximum gravity!
-- ??? : ???
-- ??? : ???
+- ZEN : practice indefinitely in this mode with no gravity!
+- ??? : still to do
 
 ## Manual build
 
@@ -56,5 +56,5 @@ If for some reasons you wanna run the command line version:
 Library used: [SFML 3](https://www.sfml-dev.org/).  
 Font used: [Press Start](https://www.zone38.net/font/#pressstart).  
 
-Inspired by other stacker games such as Techmino, jstris, tetr.io, etc.  
+Inspired by other modern stacker games such as Techmino, jstris, tetr.io, etc.  
 This game isn't affiliated with any of them.  
diff --git a/src/Core/GameParameters.cpp b/src/Core/GameParameters.cpp
index 625c206..87621a1 100644
--- a/src/Core/GameParameters.cpp
+++ b/src/Core/GameParameters.cpp
@@ -22,6 +22,8 @@ void GameParameters::reset() {
         case MARATHON : {this->level = 1; break;}
         // goes from level 20 to 39
         case MASTER : {this->level = 20; break;}
+        // no gravity
+        case ZEN : {this->level = 0; break;}
         default : this->level = 1;
     }
 
@@ -58,6 +60,8 @@ bool GameParameters::hasWon(int framesPassed) const {
         case MARATHON : return this->clearedLines >= 200;
         // win once 200 lines have been cleared
         case MASTER : return this->clearedLines >= 200;
+        // infinite mode
+        case ZEN :
         default : return false;
     }
 }
@@ -65,13 +69,14 @@ bool GameParameters::hasWon(int framesPassed) const {
 void GameParameters::updateStats() {
     /* NEXT QUEUE */
     switch (this->gamemode) {
-        // 5 for rapidity gamemodes
+        // 5 for fast-controls gamemodes
         case SPRINT : 
-        case ULTRA : {
+        case ULTRA :
+        case ZEN : {
                 this->nextQueueLength = 5;
                 break;
             }
-        // 3 for endurance gamemodes
+        // 3 for slow-controls gamemodes
         case MARATHON :
         case MASTER : {
                 this->nextQueueLength = 3;
@@ -126,6 +131,8 @@ void GameParameters::updateStats() {
     switch (this->gamemode) {
         // starts at 500ms (30f) at lvl 20 and ends at 183ms (11f) at lvl 39
         case MASTER : {this->lockDelay = 30 - (this->level - 20); break;}
+        // 10s
+        case ZEN : {this->lockDelay = 60 * 10; break;}
         // 1s by default
         default : this->lockDelay = 60;
     }
diff --git a/src/Core/Gamemode.h b/src/Core/Gamemode.h
index 68a60f8..15f7531 100644
--- a/src/Core/Gamemode.h
+++ b/src/Core/Gamemode.h
@@ -8,5 +8,6 @@ enum Gamemode {
     SPRINT,
     MARATHON,
     ULTRA,
-    MASTER
+    MASTER,
+    ZEN
 };
diff --git a/src/GraphicalUI/AppMenus/GameSettingsAppMenu.cpp b/src/GraphicalUI/AppMenus/GameSettingsAppMenu.cpp
index 50abd17..0eb4dc8 100644
--- a/src/GraphicalUI/AppMenus/GameSettingsAppMenu.cpp
+++ b/src/GraphicalUI/AppMenus/GameSettingsAppMenu.cpp
@@ -12,7 +12,7 @@
 
 GameSettingsAppMenu::GameSettingsAppMenu(std::shared_ptr<MenuStack> menuStack, std::shared_ptr<Settings> settings, std::shared_ptr<sf::RenderWindow> renderWindow) :
     AppMenu(menuStack, settings, renderWindow),
-    playerCursor(std::vector<unsigned int>({2, 3, 1})) {
+    playerCursor(std::vector<unsigned int>({2, 3, 2})) {
 
 }
 
@@ -32,7 +32,7 @@ void GameSettingsAppMenu::computeFrame() {
         case 2 : {
             switch (this->playerCursor.getPosition().x) {
                 case 0 : {this->settings->setGamemode(MASTER); break;}
-                case 1 : break; //TODO
+                case 1 : {this->settings->setGamemode(ZEN); break;}
                 case 2 : break; //TODO
             }
             break;
@@ -68,7 +68,7 @@ void GameSettingsAppMenu::drawFrame() const {
     this->placeText(text, this->playerCursor, "MARATHON", 25.f, 25.f, sf::Vector2u{1, 1});
     this->placeText(text, this->playerCursor, "ULTRA", 50.f, 25.f, sf::Vector2u{2, 1});
     this->placeText(text, this->playerCursor, "MASTER", 5.f, 35.f, sf::Vector2u{0, 2});
-    this->placeText(text, this->playerCursor, "??? (TODO)", 25.f, 35.f, sf::Vector2u{1, 2});
+    this->placeText(text, this->playerCursor, "ZEN", 25.f, 35.f, sf::Vector2u{1, 2});
     this->placeText(text, this->playerCursor, "??? (TODO)", 50.f, 35.f, sf::Vector2u{2, 2});
     
     this->renderWindow->display();
diff --git a/src/GraphicalUI/main.cpp b/src/GraphicalUI/main.cpp
index 745bb68..8a60631 100644
--- a/src/GraphicalUI/main.cpp
+++ b/src/GraphicalUI/main.cpp
@@ -1,6 +1,7 @@
 #include "GraphApp.h"
 #include "../Pieces/PiecesFiles.h"
 
+#include <filesystem>
 #include <fstream>