I think I almost got soft locked, had to perform a very hard jump to get out
(light spoilers)
I got the double jump, and then when back to near the start, but decided to travel left again, this time taking the top path.
When I reached a big gap, I double jumped across - I didn't make it, it was too far, but then I respawned at what I can only describe as a collectable, because it didn't tell me anything else about it.
But then double jumping back wouldn't reach the other side, and I'd constantly respawn on the side where the collectible was.
I eventually got out by jumping on the edge of the spikes, where there must not have been hitboxes (I don't know if that was a mistake or intentional leniency, but please keep it in even if it was a mistake) - but I don't think the average player would try to do that spike jump.