thanks for playing my game, I'm glad you enjoyed it.
I'll look into the grapple cooldown, I don't want to make it too short but it could prolly be reduced slightly, maybe something proximity based so the closer to the wall you were the quicker it recharges. I'll give it some thought.
And do you know which spike it was, or which room it happened so I can better locate the bug? Sounds like a room transition is messed up somewhere.
Edit: Was it one of the rooms with the all spider webs about, because I think I've found the cause.