We're very excited about the community aspect of Tidalis and look forward to seeing lots of puzzles being shared here. Puzzles posted here may be used in the official game with credit given by real name or handle - just let us know what you'd like to go by. This is by no means a guarantee that your puzzle will make it in! Furthermore, users are welcome to opt-out; just make a note in your post.
For those downloading puzzles, we suggest you create a new folder for them called User Puzzles at \Tidalis\RuntimeData\Logic\LevelFolders\ and put the puzzles there. You'll then be able to easily access that in-game.
For those posting puzzles, simply upload the .dat as an attachment in a thread and that's that! Attaching a picture of the puzzle may be a good idea for giving people more information and getting people interested in the puzzle enough to download it. Feel free to discuss puzzles and voice your support for ones you enjoyed.