Fix a small oversight.
BTW, thanks for this great game. It's perfect with a SNES gamepad. Can't stop playing it ^^
I'm glad you like it. And I appreciate you cleaning up the Makefile to allow for easy packaging. Usually I don't worry about packaging my software because I run it within the build folder, or I use a barebones approach (such as cp $executable /usr/bin/).
cp $executable /usr/bin/