Maybe mention that the order you set body related properties matters

[iCodeForBananas]

Fantastic job on this! :)
This is easily core worthy.

[hexus]

Thank you! I'm glad you like it.

Thanks for explaining this issue so clearly, I'll clarify in the readme and maybe even find a way to fix this so the first case works okay.

[hexus]

Sorted in v0.1.1. Should be a little clearer now. It's only the size of the sprite that matters, as slopes.enable() creates the body's SAT.js polygon used by the collision solver.