Hi!

Just when I finally thought I got this gem to work, I get hit with the error below when I run ruby tutorial.rb:

vagrant@vagrant-ubuntu-trusty-64:/vagrant/gosu-examples-master/examples$ ruby tutorial.rb
/home/vagrant/.rvm/gems/ruby-2.3.1/gems/gosu-0.13.1/lib/gosu/swig_patches.rb:20:in initialize': Could not initialize SDL Video: Failed to connect to the Mir Server (RuntimeError)
        from /home/vagrant/.rvm/gems/ruby-2.3.1/gems/gosu-0.13.1/lib/gosu/swig_patches.rb:20:in initialize'
        from tutorial.rb:86:in initialize'
        from tutorial.rb:134:in new'
        from tutorial.rb:134:in `<main>'

Any recommendations for resolving this error? I do not want to give up quite yet so I would greatly appreciate any ideas!

Thanks!