I wanted to respond because I am a 3D Artist and Level Designer for Jarkour. Rowe and I just read your response.
We really liked all the ideas you gave (especially the water and lava thing), your ideas brought more ideas to our minds. Thanks to you, we want to develop and improve the game even more. Since we are new to 3D and not used to the platformer genre, the process may take a little longer, but we'll definitely try.
Thank you very much for taking your valuable time to write. :)