Thanks for all your bug reports! I've just released a new version of the game with a number of fixes, listed in my newest devlog. Most of the bugs you mentioned are included, so to quickly address those that aren't:
1. I couldn't replicate the issue with ice monsters in the crystal glade, ice damage against them appears correct in testing and the database.
2. Regarding the spellblade shop, they only sell unique spellblade equipment. The abandoned armor store there can reward you with Warlock Armor or Mending Armor, but these can both be bought at the normal shop in Oasis.