I played it twice.
I think the main reason I played it twice was to see if there was a different ending.
Overall, it is a basic game, nothing too complex, but an interesting idea that could be expanded on. I think over all it was not bad.
The reason for the 3.5 stars was simple, the sound was boring, could be improved. Controls were spot on, but spamming keys does not equate fun for me. The graphics were fine for what it was.
If the sound is improved, and the game goes from spamming keys to win, to a more strategic game play, or even if you got some "Power up's" even a comical sayings from those being flipped by the bridge it would improve the game overall.