The UFO from Retro Unicorn Attack:Challenge Edition.  

If you play really well, and reach a certain area, these come by instead of the original jumping dolphins.  Jumping cats and flying birds will also appear.

Also try Retro Unicorn Attack: Challenge Edition, which is an even more epic unicorn running, jumping, fairy filled, dimension-shifting adventure. 

Behold, the majestic Retro Unicorn.  

Up next in our 10 yr Pixeljam Anniversary Retrospective: Retro Unicorn Attack, a de-make of Adult Swim’s hugely popular Robot Unicorn Attack. 

Run for the stars, blast rainbows out of your butt, catch some fairies, experience dolphins, revel in Mark DeNardo’s amazing 8-bit rendition of Erasure’s “Always” as you follow your dreams.

And you can read a little about it here as well:
pixeljam.com/blog/articles/2015/06/08/retro-unicorn-attack-feel-the-magic

One more genetically altered mutant alien from Captain Commander. 

This one seems particularly distressed.  Perhaps because it’s still somewhat close to its original form, yet a freakish abomination! 

You can see here a bit of what he thinks and feels

We don’t think this was a naturally occurring species either..

Was this guy born this way? We think not..

We couldn’t finish retrospecting Captain Commander without showing these mutated Aliens in the Alien Science Lab.

I don’t think they enjoy their mutated states very much..

Here’s a full-view of the Prison level (L2) of Captain Commander. 

Here’s a mockup of the jailbreak cutscene in Level 2 of Captain Commander. 

Once he has the key, he uses it as his weapon until he recovers his weapon gear.