Update README.md

README.md

@@ -10,15 +10,30 @@ git clone https://github.com/BrinzaBezrukoff/tictactoe.git
 ```
 cd tictactoe
 ```
-3. Compile source:
-```
-gcc main.c tictactoe.c minimax.c -o tictactoe
-```
+3. Compile source with make:
+  ```
+  make
+  ```
+  or with gcc:
+  ```
+  gcc main.c tictactoe.c minimax.c -o tictactoe
+  ```
 4. Run binary:
 ```
 ./tictactoe
 ```
 ## Play
-X is human, O is AI.
+
+
 1. Choose who will be make turn first. Type X or O and press Enter key.
-2. When it is your time to make turn, type 2 numbers: row and column indices of cell, where you want to place X.
+  ![image](https://user-images.githubusercontent.com/29017599/138512021-00aa33b2-c18c-4c30-8938-d2b4b989de8e.png)
+  * Human playing for X
+  * AI playing for O
+2. Choose level mode for AI (this feature in develoment, some modes work incorrect):
+  ![image](https://user-images.githubusercontent.com/29017599/138511830-b7aa34fc-f540-44e7-8246-3402b464d4f4.png)
+  * Easy (E)
+  * Medium (M)
+  * Hard (H)
+  * eXpert (X)
+3. When it is your time to make turn, type 2 numbers: row and column indices of cell, where you want to place X.
+  ![image](https://user-images.githubusercontent.com/29017599/138511117-e12dba88-b23c-44d6-87a8-3afce50d9b97.png)