[secdeal]

> Now what I'm really curious about is why [...] a simple 59-line example, is using unsafePerformIO

It seems to me that they are using the physics engine Chipmunk2D for that Animation which has bindings with IO in their signature.

[lilyball]

The Reanimate site says that it ships with Chipmunk2D, and the example I linked shows both

  import Chiphunk.Low
  import Reanimate.Chiphunk

However I can't find any reference to Reanimate.Chiphunk anywhere, and if I search the repo for "chiphunk" I just see this example file, the readme, and a couple of YAML files. So I am very confused now.