Well it was professional seeming. Although I liked the music I am not sure it fitted the game. I'll go over the bad points (for me) first because unlike most people I feel like doing good then bad is stabbing someone in the back.
Bad (imo):
-Weird design choices: the explosion has a huge range and kills the old man but it is very easy to right click instead of left. Crucially you don't tell this to new players who will likely get frustrated losing because they pressed a wrong key not clearly outlined.
-No puzzle element - unless there is some past level 4: the levels are very linear and you need to hack EVERY console. There is no choice involved.
-Hard to feel like it's outer space with earth animals and earth clouds (if you look up). Could put a touch of effort into making the models alien looking.
-Sound FX seemed too exaggerated and the console hack animation was annoyingly long.
Pros:
-Polished feeling
-Good music just doesn't fit
-No bugs afaik
-Good difficulty curve