Great news! Receiver was finally released on Steam today. You can get it here: http://store.steampowered.com/app/234190/
@doorselfin David Rosen (the developer) from Wolfire made his code repository from this 3-day game-jam public a while ago (https://github.com/David20321/7dfps), so one could also just download and install the free version of Unity3D (http://unity3d.com/unity/download), check-out his source repository, run a full build and get just about the same game for free I suppose.
Anyways, it's just about 4 EUR at the moment (aka a breakfast), the above would be the "cheap bastard" way.
I for my part got my money's worth of entertainment out of the version I bought a few months ago and keep coming back for more rage-quits.
Definitely worth the money and I'd like to see Wolfire make something "more" with it - perhaps after they've finished Overgrowth.