This was really cute! definitely reminded me of the old Game and Watch stuff; I think going the extra mile and making the presentation emulate old liquid crystal screens with the graphics would really push this over the line for me; as it stands it's a fun, simple gameplay concept.
A less abstract theme could also be a fun addition; a lot of old game and watch stuff had a idea or theme to give context to the gameplay, Fireman or Vermin come to mind.
I didn't *quite* understand the pattern behind the grey dots movement, making that a little more clear would help as well I think
Overall good job! got a highscore of 23