Overall I can't say I had a lot of fun playing this. First of all, the jumping mechanic felt unrealistic - like I was on the moon - and gave no feedback whatsover. Second, fighting the enemies weren't very intriguing either as I could just stand by them, hold space resulting in the enemy getting constantly stunned and unable to inflict damage upon me while I disintegrate them. The exact same goes for that "boss", which was just annoying for me. The way you implemented the theme, with these other NPCs following me around, was however rather good.
I very mych liked the graphics though, but the sound not as much. There was some music, which is the bare minimum, but it was just one track looping over and over. To top that off, there were no sound effects at all which significantly impacted the immersion, as well as my overall satisfaction.