Restore the pq6.2 levelling schedule. Some half-baked online game support from 2018 that's now commented out.

config.js

@@ -304,7 +304,7 @@ Number.prototype.div = function (divisor) {
 function LevelUpTime(level) {  // seconds
   // 20 minutes for for level 1
   // exponential increase after that
-  return Math.round((20 + Math.pow(1.15, level) * 60);
+  return Math.round((20 + Math.pow(1.15, level)) * 60);
 }