Yes, that is the first stage of the Donkey Kong arcade game in the second-to-last panel, and the silhouette of the USS Enterprise from Star Trek as well. I love dorky references like that.
There are some fun details on this page I am looking at now having not seen this comic in a while. The depth of field is fun, as well as the Shmoofy logos on the waste barrels.
Pretty good stuff, I think.