Tetrachroma Demo Update (0.2.1)

I've updated the Tetrachroma demo with some quality of life improvements and fixes. I plan to release several small updates to the demo as I work toward the full 1.0 release. Thank you to everyone who has provided feedback on the forums and elsewhere!

Changes:

• Enabled Steam Cloud. If you've played the game on multiple machines, please be cautious when resolving any Steam Cloud conflicts.
• Added descriptions to the Controls Handling options menu.
• Added a tutorial message when you first play Puzzle mode.
• Added "total games" to the stats screen when the Endless option is selected.
• Fixed a bug that caused the game to write to the save file twice when completing Puzzle mode. In rare cases, this redundant saving could cause issues on certain machines.

Note about game saves:
My goal is to make the full version of the game fully compatible with the demo in terms of stats and progress. However, I'm considering some balance changes to the scoring system and overall difficulty before the full release. If these changes are implemented, a future demo update may reset stats and records related to scores to ensure consistency with the full version. I'll include this information in the patch notes, but I wanted to give you a heads-up if you’d prefer to wait for the complete game.