I've played both Kill the K.O.T.H and DUE, and I absolutely love both these games. Simple, but fair climbing mechanics, fantastic atmospehere and endings that give me chills. I look forward to playing more games like this!
Glad to hear!
Stay tuned for Kill The KOTH dev log updates; I am planning to make it a commercial game after some polish.
I also plan on making a sandbox mode people to play around with new mechanics / ideas I have until the commercial version has a solid development / marketing plan.