diff --git a/.gitignore b/.gitignore
index 1402d83..26a5b93 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,5 +1,6 @@
 obj/
+build/
 game
 *.core
-src/config.h
+include/config.h
 config.mk
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 09c536c..e1d85c6 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,5 +1,5 @@
 cmake_minimum_required(VERSION 3.5)
-project(csnake VERSION 0.1.0 LANGUAGES C)
+project(csnake VERSION 1.0 LANGUAGES C)
 
 if(PROJECT_SOURCE_DIR STREQUAL PROJECT_BINARY_DIR)
   message(FATAL_ERROR "In-source builds are not allowed.")
@@ -12,7 +12,7 @@ add_executable(csnake
   src/player.c
 )
 
-set_target_properties(csnake PROPERTIES C_STANDARD 11)
+set_target_properties(csnake PROPERTIES C_STANDARD 99)
 set_target_properties(csnake PROPERTIES C_EXTENSIONS FALSE)
 target_include_directories(csnake PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}/include)
 
diff --git a/README.md b/README.md
index 74bf33b..33d26eb 100644
--- a/README.md
+++ b/README.md
@@ -1,7 +1,19 @@
 # csnake
 Snakegame written in C.  
 
-Controls
+Controls  
 --
 - WASD - movement  
 - P - Pause
+
+Supported platforms  
+--
+Was tested on:  
+- FreeBSD 13.2  
+- Windows 11 (both MinGW and MSVC)  
+- Linux 6.5.8 (glibc 2.38-7)  
+
+Building
+--
+- On \*nix-like systems you can use GNU Make with configure script providing arguments through environment variables or CMake   
+- On Windows you can use CMake  
diff --git a/configure b/configure
index 0843f06..e5add12 100755
--- a/configure
+++ b/configure
@@ -6,7 +6,7 @@ then
     CC      - compiler (default: cc)
     CFLAGS  - flags for compiler
     LDFLAGS - flags for linker
-    OUT     - out file (default: game
+    OUT     - out file (default: csnake
     SIZE    - size of game field
     DEFX    - start x
     DEFY    - start y"
@@ -16,7 +16,7 @@ fi
 CC=${CC:-cc}
 CFLAGS=${CFLAGS:-}
 LDFLAGS=${LDFLAGS:-}
-OUT=${OUT:-game}
+OUT=${OUT:-csnake}
 SIZE=${SIZE:-10}
 DEFX=${DEFX:-0}
 DEFY=${DEFY:-0}