Hey @tnoleto, do I know you in person? :-)
Unfortunately, right now, the controls are locked. We didn't have time to implement input customization and I wouldn't reccomend messing up with the input tab in the configuration screen (the one that's shown before you launch the game).
Did you find the controls difficult somehow? What changes you were trying to do? Answering these questions would let us understand your necessity and reprioritize the importance of input customization in our game.
Thanks for playing (and for testing our untested Linux build)!