docs: update readme

README.md

@@ -1,2 +1,27 @@
-# carrot-game
+# Carrot Game
 
+Famous Carrot in [Pepper&Carrot webcomics](https://peppercarrot.com) is very hungry.
+
+In this game he has to eat as fishes as possible.
+
+Each eaten fish brings 10 points but same for those missed.
+
+You can miss 5 fishes but you lose if you have no point left.
+
+## Hardware
+
+- Arduino Uno R3
+- LCD 128x64 with DFRobot SPI module
+- WiiChuck PCB to connect a Wii chuck
+- Speaker
+
+## Pin connection
+
+- A2, A3, A4 and A5: WiiChuck
+- D2 (CLK), D10 (DATA), D7 (CS): LCD SPI
+- D8 Speaker +
+
+## Libraries
+
+- [U8g2](https://github.com/olikraus/u8g2/wiki) to manage LCD graphics
+- ArdunoNunchuck by Gabriel Bianconi