Not bad, I like the humor. good jokes. My suggestion would be to add some real sound effects, I get some from freesound.org , you can also get some sound effects and music from freepd.com .
Also, the eyes not moving is distracting in a weird way. Facial movement during dialog will draw the eye to the character, so the viewer will not be distracted by other movement on the screen. This goes the same if you add a tongue for "L" syllables, and scrunch the bottom lip for "F" syllables. In this style you could maybe bend the bottom jaw to do that.
The space ship is awesome, good work there. and keep it up, i liked it.
hope i was of some help.