Perfect
One button games tend to either be incredibly good, or incredibly bad. This game is the former, in spades. Gameplay is straight-forward, the presentation perfect, and sound and graphics exactly what they need to be.
I still can't believe how many people (from what I've seen in the App Store) are complaining for "more content" like "different level set ups" and so on. This game is a great example of how sometimes less can be more. I'm a huge fan of when developers and designers can provide just the right amount of content, and even more of a fan of when they go the minimalistic route and nail it.
As of time or writing, both the Flash and iPhone version has not yet established leaderboards, but honestly that's not something I'd lessen my review over.
Thank you for both creating and sharing this game with us. Keep on rockin'!