An update introduced last week caused a bug with the grappling hook in the Forest of Lost Memories area where the hook wouldn't work as expected, leaving the game in a softlocked state. Download the latest version through the itch.io app to resolve this issue or download the latest update from here and overwrite your local game directory with the new files. 

Your saves should not be affected in both cases. Sorry for any inconveniences this bug caused and please reach out in the comment section if you need any help.