Always be careful if you are adding camphor if added more then whole recipe will be a mess and its optional.
If you find the boondi forms tails then your batter is thick so add needed water and test till you get round boondi's.
If the batter is too thin then you can always correct by adding more besan.
The syrup consistency is important and you can make ladoo's by wetting your hands with water now and then when making ladoo's.
Adding colour is purely optional.
Oil should be nicely hot when frying boondi's and don't fry for much time other wise the boondi's will become crisp.
When making balls the oil from the boondi will ooze and it will be easy to make the balls.