The main thing to keep in mind with Acrobats is this - it's not a game, per se, it's more of an iPhone based toy. Launch the app and five multicolored, three-appendaged... things.... pop up and immediately start bouncing around. They do their best to keep attached to each other, sticking together with their suction cup-like hands. Grab one and toss him around, and it'll bounce around, sticking to the other creatures as best as possible, or just tilt the phone and watch all of them fall downwards.
It sounds like a simple idea, but the amount of detail that goes into how they interact with each other is intriguing. A row of icons along the top of the window gives you a handful of options - add or subtract creatures, turn on the backlight (turning the background from black to blue, and making all of the creatures dark blue), and finally, one that allows you to tweak just how these little guys work, which makes this go from a "well, that's okay" 2 or 3 stars to a solid 4.
You can adjust the creature size. The strength of gravity. The amount of balance they've got. How sticky their hands are. How fast they move, etc, etc. Tweaking these adds a level of creativity to this that makes the app endearing and I've found it's an enjoyable diversion when I'm on the train and don't feel like playing a full-scale game.
All in all, a fun little toy for the iPhone. Can't say I'd spend more than a buck, but Vectorpark does some quality stuff, and this holds up.