Add a fishing game feature that ties into the heart economy, something like this:
-buy bait
-use bait for fishing
-catch fish
-sell fish for profit
-use hearts to buy more bait and better fishing poles, trade fish
-better fishing poles and better bait increase your odds of catching good fish
-better fish sell for more profit
-fish should all be Touhou themed
Add a fishing game feature that ties into the heart economy, something like this: -buy bait -use bait for fishing -catch fish -sell fish for profit -use hearts to buy more bait and better fishing poles, trade fish -better fishing poles and better bait increase your odds of catching good fish -better fish sell for more profit -fish should all be Touhou themed