Hmmm, like at the beginning we have the Gacha-Cat which costs "Gacha coins", or when we "reform" equipment that costs "Leviathan's hammer", in the treasure event it costs "gold vouchers". Then, I finish creating the ship and go to the ghost island, there is a shop selling all things by "Soul point" and when I finish the Normal mode of Greedy Cave, the game opens the dreamland (press the flower) and that shop costs "dream crystal". Besides, if you can adjust the coupon, it can work instead of "Gold voucher".
If Leviathan's Hammer and Gacha coins (or coupon) can adjust at the beginning, it would be better.
You could try to check when you have time, and I can send some img if you need it. Thank you so much !!!