Pretty fun! It crashes reliably for me right after I build a police station, however. Console says:

  micropolis.js?f750f1ad7f255ea64b6a:1 Uncaught TypeError: 
  A.Position is not a constructor
      at micropolis.js?f750f1ad7f255ea64b6a:1:242246
      at De.mapScan (micropolis.js? 
  f750f1ad7f255ea64b6a:1:243311)
      at Object.Wi [as _simulate] (micropolis.js? 
  f750f1ad7f255ea64b6a:1:272893)
      at Object.bi._simFrame (micropolis.js? 
  f750f1ad7f255ea64b6a:1:269927)
      at Object.bi.simTick (micropolis.js? 
  f750f1ad7f255ea64b6a:1:269535)
      at ys.Us (micropolis.js?f750f1ad7f255ea64b6a:1:350146)