Go here
C:\Users\*user name*\AppData\LocalLow\Foxy Voxel\Going Medieval
Find a file like "SAV" (this is your save game) and open with Notepad ++

Open search and type  "displayName":

},
"skills": {"displayName":

Here are your skills,

"level": 10            (Maximum Lvl 10)
"experience": 48000,     
"passionLevel": 2         (Maximum 2 )