Added basic player movement.

src/input/input.c

@@ -94,7 +94,7 @@ inputval_t inputGetAxis(inputbind_t binding) {
 float inputGetFullAxis(inputbind_t positive,
   inputbind_t negative
 ) {
-  return INPUT_STATE.current[negative] + INPUT_STATE.current[positive];
+  return -INPUT_STATE.current[negative] + INPUT_STATE.current[positive];
 }
 
 float inputGetAccuated(inputbind_t binding) {