Really cool take on an infinite climber game. I got to about 370m.
I would suggest the following changes: Portals can only be used once, and are deterministic instead of random. I found myself just spamming teleport if I got a bad one.
Make everything interactable with 'E', and have the items usable by pressing numbered hotkeys. Making this full screen instead of mobile would open you up to more options in terms of travel paths ect.