diff --git a/main.lua b/main.lua
index 6aa25641..f3c5c908 100644
--- a/main.lua
+++ b/main.lua
@@ -11,14 +11,14 @@
 --        *  .        +    .   * `  t                 *  ,        .    .          ^           `                   ^    `        --
 --  .      _    `                -       ,     ^     *          `              `     +    *         -       .       +      .    --
 
--- Techmino: Galaxy is an super-improved version of Techmino.
--- Creating issues on GitHub is welcomed if you also love tetromino stacking game
+-- Techmino: Galaxy is an ultra-improved version of Techmino.
+-- Creating issues on GitHub is welcomed if you also love stacking/matching game
 
 -- Developer's note
--- 1. I made a framework called Zenitha, *most* codes in Zenitha are not directly relevant to the game;
+-- 1. I made a framework called Zenitha, the code in Zenitha are not directly relevant to the game;
 -- 2. This project use Emmylua for better IDE support, recommend to use it if you can;
 -- 3. Check file ".editorconfig" for detailed formatting rule (but not exactly, don't change large amount of code with it);
--- 4. "xxx" are texts for reading by the player, 'xxx' are string values used only in code;
+-- 4. "xxx" are texts for reading by the player/developer, 'xxx' are string values used only in code;
 -- 5. Most codes are focusing on efficiency, then maintainability and readability, excuse me for some mess;
 -- 6. 26