Pan-tilt code install failed> Missing demo - help please

[wheelocknet]

admin@pi:~ $ git clone https://github.com/ArduCAM/PCA9685.git
Cloning into 'PCA9685'...
remote: Enumerating objects: 52, done.
remote: Counting objects: 100% (52/52), done.
remote: Compressing objects: 100% (50/50), done.
remote: Total 52 (delta 9), reused 31 (delta 0), pack-reused 0
Receiving objects: 100% (52/52), 248.00 KiB | 7.51 MiB/s, done.
Resolving deltas: 100% (9/9), done.
admin@pi:~ $ cd PCA9685/
admin@pi:/PCA9685 $ make
make: *** No targets specified and no makefile found. Stop.
admin@pi:/PCA9685 $