How to Make Ladder Game Using ATtiny13a and Mini Breadboard.

I made the game that I used 12 LED for using breadboard and ATtiny13a.
I can buy ATtiny13a in a half dollar in Japan. It is a very cheap microcomputer. Memory is low and 1KByte.
I challenged the making of Ladder game in 1KByte.

I wrote in a program at ATtiny13a using Arduino IDE used version 1.06 and Arduino core for Attiny13.
Sketch　（Arduino source code.）

Fuse bit :hFuse = 0xFF, lFuse= 0x7A
(interne 9.6 MHz clock)

1x ATtiny13a
1x Mini breadboard
1x CR2025 CR2032 3v button battery holder
1x Button(Tactile switch)
1x 10K resistor
12x 3mm LED
Jumper wire

Done!
have fun :-)