Update 1.41

A small patch — mostly under-the-hood fixes, with a couple of things you'll actually notice.

• Clearer feedback when an item doesn't fit. Reworked the visual response when you try to place something where it can't go.
• The hint is easier to read — the background behind it now dims.
• Quests now count items that were already on the level. Previously only items you'd picked up yourself were counted.
• Fixed merging an item that has something standing on it.
• The save system is more resilient.
• Updated the Unity version

Thanks to everyone sending bug reports — almost everything on this list came from you.