I remember seeing someone playing it and to this day I still don't understand it...

Coolspot was a good game imo. It had an akward rythm about it as a platform that had many people turned off about it. I especially loved the bonus mission at the end of the stages were you where inside of a 7up bottle trying to burst as many bubbles you could before time ran out. I've never played Pepsiman and to be honest never heard of it. The only other advertisement game back then that I played was Yo 'Noid. Brings back memories, lol.

Oh and 7up>Sprite. If you like those types of sodas you'll drink 7up and realize Sprite has no flavor.