What Changed?
Upon entering the Weapon Shop in Good Kingdom (the first city after you leave Arcadia) the game would enter a buggy state where it did not respond to any keyboard or mouse inputs and you could not exit the shop or interact in any way. This required crashing the game to escape.
This bug has been patched. Now entering the Weapon Shop will not break and you can successfully purchase your first sword in Good Kingdom!
Root Cause
Several events were added to various maps to create the gameplay and cinematic trailers for the game. These events would auto-move the player or various NPCs around the map to create motion and intrigue, and do so in a consistent and predictable way so we didn't risk an NPC walking off-screen during the trailer.
One such event was added to the weapon shop to demonstrate the player walking in, walking up to the counter, and making a purchase.
Since this was just a temporary event and not intended to be part of the final release, the event did not clean itself up or flag itself as "complete" after moving the player up to the counter. Instead, it kept running in an infinite loop to continue walking the player forward into the counter forever.
When cleaning up the events prior to the demo release, I neglected to remove this one -- leading to the bug.
Discovery
Huge thanks to Malok for discovering and reporting this bug during demo play!