100% completion!! very hard game but fun
sorry for not immediately reply (I hope is not too late)
1. if you mean the title screen puzzle,I think let red eat every fruit will do.
2.for level Y you need to use the extra ground to let the yellow move again. and I won't tell you when to eat what.
you probably already done level X so I believe you can figured out.
3.for level X you need to find two different way to push the yellow up once, and reaching that part is the hard and fun part.
also solve all 4 star level to scroll the credit screen