@Aadhini Voice note mudiyavillai, text-il therivikkiren
1. We should keep this thread only for clues. Because, when users login in forum, it should be easy for them to track the clues. You may even consider locking this thread after deleting all posts other than clues and answers. Fix a time to post clues and again lock the thread.
2. We can have a separate 'Conversation' with all participants of the game for discussions, or even a separate thread 'Tambola Discussions' can serve the purpose
3. Those 90 numbers can be clubbed into 6 sets of 15. First day, you give the tougher clues for all 15. After 24 hours gap, you give next set of 15 clues for the same 15 numbers. After 12 hours you reveal the answer and give the first clues for next set of 15 numbers.
4. Reason is, there should be some motivation for us to work on the tougher clues. If i know that i would get a easier clue in next 2 hours, i may not work on the harder puzzle. Also, I'll be under pressure to get maximum numbers cracked in those 24 hours to have an edge over others
5. Publish the standings! This will be a tracker. When everyone says Bingo, please verify their ticket and add a point against their name in the standings. For example Rajni might have scored 2 points now, Mask 1 point... So, eventually the first one to reach 15 points in the Leaderboard becomes the Winner. 5 points can be considered as a Milestone if you wish to add this (slightly tweaked from entire row rule in actual Tambola)
These are just my thoughts. You may implement this which you find feasible.
You put in lot of efforts in the construct of the game, so let's not stop this. Once ppl get the flavour of the game, I'm sure they will jump in