Please see the illustration. I can install and run the same snap in Ubuntu 16.04 . But in Ubuntu 14.04, I can install it successfully, but cannot run it .
Have you tried logging out and in? snapd isn’t installed by default in Ubuntu 14.04 LTS, so if you only just installed it then /snap/bin might not be in your path until you start a new session.
If that doesn’t work, I’d be interested to see the output of
ls /snap/bin and