Thanks for the kind words and giving it a play. Yeah the difficulty ramp was completely rubbish - no ramp, purely RNG. The original build was me just trying to get something to post before the deadline. The new build is based on progression and the helicopter shouldn't show up before 2km now (though I just finished a play test that had him appear at 1.73 -sigh). A "How to Play" screen is still on my to-do list. It should be so easy to knock out, but then again it never usually works that way.