You can uninstall or removes an installed morse-simulator package itself from Ubuntu 14.04 LTS (Trusty Tahr) through the terminal,
$ sudo apt-get remove morse-simulator
If you would like to remove morse-simulator and it's dependent packages which are no longer needed from Ubuntu,
$ sudo apt-get remove --auto-remove morse-simulator
If you use with purge options to morse-simulator package all the configuration and dependent packages will be removed.
$ sudo apt-get purge morse-simulator
If you use purge options along with auto remove, will be removed everything regarding the package, It's really useful when you want to reinstall again.
$ sudo apt-get purge --auto-remove morse-simulator