Well after doing that I now get this.
src/entities/Ship.hx:45: characters 37-45 : Class<haxepunk.HXP> has no field sign
And it takes me to the ship.hx and brings me to this line "velocity = maxVelocity * HXP.sign(velocity);"
P.S: If I remove the line the game runs but I'm not sure if this line does anything important...