The upgrade button makes me move left instead.
The art style is super fun and quirky! I love it. Reminds me of Don't Starve.
Indeed Don't Starve is part of our references for this game ;)
The lattest version we could upload was unfortunatly in (ZQSD, french keyboard), but you can find a wasd version on this link: http://portfoliobecher.com/GMTK2/