Pyroclast seems like a decent enough execution of a game from what I can see. Assuming you were under some sort of time limit from the class. Not sure how much level design there is in an old-school space shooter like that. I'm guessing you set up the enemy positions and behaviors? Hard to tell from just the pictures but a little experience in unity doesn't hurt.
Not sure about joy ride the video is pretty flashy without much (any?) gameplay.
Massteroid is awesome! Sure it's a pretty simple game but that isn't always a bad thing. It's a fun idea and there seems to be a good level of polish on it.
To get out of your rut I would focus on a slightly larger project or a smaller one where you assume more responsibility. You don't want to bite off more than you can chew since you're working on a resume'. Adding another finished, polished game to your resume' will be worth more than saying you're working on some awesome game. It looks good, have fun, land an internship.