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They do have some examples of the engine working in the "guide" pages [1], but I don't really know enough about the technology to be impressed. "It's just a black triangle."

[1] http://helm-engine.org/guide/gradients/

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Those don't really show much of the FRP style programming, it's how pretty much all haskell graphics libraries work.

The language that Helm was inspired by, Elm (http://elm-lang.org/), does have multiple examples to show the power of FRP.

The resources surrounding Elm are the best set of FRP examples I've seen so far.

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