Original method by inverbatim

http://steamproxy.com/profiles/76561198051768108

When you transform into Piranha-man :

Head to the main town and enter the door to the left of the Church (the one with a shop above it)










Drop into the well











Swim right and up- exiting through the first chute











Make your way right (ignoring the door behind the blocks)











Then drop right off the ledge and enter the door to obtain money from the chest











Exit to title screen, then re-enter game and repeat as many times as necessary.

Thank you for the great route, inverbatim!

Faithfully Yours, Tom from Hungary