Some games work well in their simplicity and I think this was one of them. True, it could have been a lot better designed, but it's still nice to see how everything works out. There wasn't much in terms of graphics or detail, but they're all fine for what they are. I like how you don't have to always touch the blue dot to advance. There are some times where it appears directly in front of the white spots.
Yes, you probably could be more detailed in this. Maybe add some shadings here and there. It is pretty cool to see how the red dot moves around. While not that memorable, it's definitley playable. There's not much else to say about something so simple.