itch.io

You can get money by defeating enemies. If you go to the menu where you can save or quit the game, there's an option to return to initial position. It'll transport you back to where you started in the game. In the starting area, there's a long dildo/penis shape statue/totem. If you hit the totem, enemies will keep spawning. You can keep doing this to grind for money. 

Enemies will sometimes drop weapons like a throwing axe or knives.

You can buy soup at the shop, where the green hair caterpillar girl is. She's located here:

Hope that helps.