Bugfix patch

A patch to mostly fix some bugs, but I also added ambient sfx to the waterfall.

• Fixed a freezing issue
• Fixed an edge case preventing the player from buying items when you had full inventory
• Added a steam page link on the game win screen
• Added aforementioned waterfall sfx (audio from Pixabay)

I've been really busy with university and other stuff, but I'm trying to get back into development now!