For the clicking, check your chain ring bolts. If any bolts are loose, grease them and re-tighten. Hopefully you used grease when you installed them; otherwise, sometimes they come loose and the chainring rattles, which can cause it to break. Also, check your chain tension. If you have a lot of play, then it could be the cranking shifting back and forth in the play of the chain when you climb, as you likely won't have a smooth cadence when you're exerting a ton of force.