Tweak again the readme.

README.md

@@ -3,13 +3,11 @@ A 3D maze game written in C for the Commodore 64.
 
 This project (distributed with the GPLv.3 license) is a very simple 3D maze for
 the Commodore 64 computer. The source code is written in C (with some inline
-assembly) and it is meant to be compiled with the cc65 compiler.
-
-The goal of the game is to find the exit of the maze in the shortest possible amount of time. The entrance of the maze is changed randomly each time the game is played:
+assembly) and it is meant to be compiled with the cc65 compiler. The game started as an exercise in high resolution graphics on the C64 and was inspired to those old 3D maze games in BASIC which was popular at the time. However, the C language is much faster than BASIC and one can do some pretty nice things. Some routines are tweaked in assembly for better performances.
 
 ![Do you dare to enter The Maze?](https://github.com/DarwinNE/C64maze/raw/master/screenshots/step_in.png)
 
-You can have a look at the maze map, but beware! Each time this is done, a penalty of 30s is applied:
+The goal of the game is to find the exit of the maze in the shortest possible amount of time. The entrance of the maze is changed randomly each time the game is played. You can have a look at the maze map, but beware! Each time this is done, a penalty of 30s is applied:
 
 ![Maze map](https://github.com/DarwinNE/C64maze/raw/master/screenshots/mazeview.png)
 
@@ -21,6 +19,6 @@ And once you find your way through it, you will know how much time you needed:
 
 ![Game completed.](https://github.com/DarwinNE/C64maze/raw/master/screenshots/exit_s.png)
 
-The music is a 3-part reduction for the SID of J.S. Bach's "little" fugue in G minor, BWV578. Hommage to Wendy Carlos.
+The music is a 3-part reduction for the SID of J.S. Bach's "little" fugue in G minor, BWV578. Hommage to Wendy Carlos. The music driver is fully interrupt-driven and it is also written in C.
 
 Author: D. Bucci