Hi. Creator here. Sorry that the game wasn't to your satisfaction.
I don't mind giving you a refund, the only issue is, I don't think Ichio has a built in tool for creators (that I can find) to issue refunds on the seller's end.
So probably the easiest way for you to get a refund would be to contact Ichio support to ask a refund.
Hope it helps, and again, sorry that the game wasn't to your satisfaction.