v0.1.2 of Mops & Mobs demo

Some small QoL things for the demo, based on feedback we got from players at the Talk&Play event last week, while we're still working out the next chapters of the full game.

• fixed a bug that would break quests after restarting the game via the main menu
• added short tutorial text boxes
• fixed chairs sometimes blocking player's movement
• changed torch a bit so it's better visible against the stone walls
• added a new door type
• added more objects to the kitchen to make it clearer it's a kitchen