Grow larger as you collect friendly bubbles while avoiding the bad ones.
At first it may seem like a rather simple take on MINDistortion's earlier effort, Bubbles until you realize it doesn't have any of the bonus pick-ups which made Bubbles so much fun. Never the less, Bubblestorm is good quality all of its own and plays more like an arena shooter where you have no bullets.
As you drift aimlessly around your small section of space, the area around you slowly fills with bubbles. are they bubbles like you? Or are they different? As you discover which bubbles are friendly, which are harmful and which produce effects (if you didn't read the title screen) you soon discover to eat the ones exactly like you and avoid the red ones. Avoidance becomes increasingly difficult as you increase in size with each successful meal thereby putting you in further danger of being popped.
It's simple, but oh so fun. Which is probably due to its incredibly infectious soundtrack, which plays like Aphex Twin in one of his happier moods.
If you liked Bubbles, chances are you'll like this, too. If you haven't had a chance to play either game yet, then you'd best get started. Both Bubbles and Bubblestorm are recommended for a quick enjoyable break.