Having never touched Orange Box or Portal before I downloaded this on reputation alone. Oh my God, I think I'm in love.
It's simple, addictive, funny, sharp, insanely clever, well thought out and has that "just one more room" factor down to a tee. Cannot believe it's taken me this long to discover it.
I hear rumours of a sequel too! It'd be awesome if they followed recent trends and adopted a co-op element (Lego games meets Portal?).
Show some love.