Its really addictive. Some reviewers gave it a low mark and said they only played it for a minute and put it down. You wont understand why this game is cool in a minute.
Its addictive because its simple and fun and quick. You get better fast and you chase your high score. If you have someone (like an SO) to play with and trade the high score, then its even better.
Graphics are classic simplicity with bright explosions that send neon sparks everywhere. Discovering new shapes is fun. And I like that you have to earn your first 1up (ie: if you die if the first few minutes youre done, but you can earn extra lives).
Adding levels or some other modes wouldve really brought out the potential of this game. As is, it is one mode of sheer simplicity non stop from the jump.
Worth it, definitely.
GhostApe about geoSpark - WARNING: Highly Addictive!