We're glad you enjoyed it, and thank you for the comment!
1. With regards to the fast-travel system and losing progress, we're looking into a different way of handling the map so as to prevent accidental warps. If you accidentally teleport to a different area, you can use Respawn (R on Keyboard, Y on Gamepad) to go back to the last checkpoint, which should be close to where you last were.
2. We've looked at the "Three Swappers" and made a small adjustment to the Dead Swapper on the ceiling, to make the initial part of it easier. Those changes are in v1.1, but do require starting a new game unfortunately.