OK I'll have a look for that spot near the stepping stones you got stuck in. When you say climb up are you using the pillar in the wall or are you firing stakes and climbing up that way? The pillar isnt supposed to be climbable... i made it that way to make playtesting easier. If you haven't figured out how to fire stakes hold trigger while holding the hammer then touch the hammerhead to the top of the crucifix where the flame is and point the pointy end of the crucifix where you want the stakes fired. Then climb up the stakes... but you gotta climb quick it's meant to be a little bit challenging climbing up fast enough before the stakes disappear.
I've had the arrow get stuck before a couple times too but I'm not sure what is causing it ill have a look at the code. Possibly because both crossbow and arrow use trigger the arrow gets called by the hand holding crossbow. So sorry for the bugs there's always a few sneaky ones. Thanks for pointing them out!!