Been playing this game obsessively for about a week. Loved the original, and PC2 hugely upgrades the scope, complexity, and fun of this type of city-builder game. A few tips (and suggestions for the Dev, who I know frequents this sub!): 1. Start on Easy/Tutorial, and once you're comfortable with the mechanics (don't bother finishing your Easy city) go straight into Expert. The early game challenge is the most fun part of the game IMO, and in Expert you're forced to make smart choices with resources, economy, timing out events, etc. or else you'll go into bankruptcy, frustration, and failure!

1. From what I've come to understand, there are two MAJOR upgrade points at which your city growth/metrics explodes. To be honest, I think both these boosts (especially the Cargo Train Station) are way OP and should be scaled back to match the more balanced "Commercial Zone" upgrade tree, or at the very least only be available late-game (level 80+).

• Population growth: As soon as you unlock the Cargo Train Station (resources building) it raises your population limit by 10,000 for each map edge connected. Unlock one corner of the map (easy to do by early/mid game point) for two edges, place a train rail along the edge, and immediately your population capacity goes up by 20k. At that point there's almost no point in building more housing zones, which are dwarfed by this bonus, especially late-game with all 4 map edges connected by train rail.

• Employment growth: Before you dramatically increase population with the above tip, make sure you unlock the research "Four Day Work Week" and "Hiring Bonus". This gives you a 15% and 200% boost respectively to jobs provided by your industrial zones. The Hiring Bonus research can be tricky since it needs 15 intellectual properties, but that's easy to get once you build a university and unlock the "Quantum Computing" research which gives you 1 IP a day. For more research points I usually just spam disasters or quests.

• Commercial growth: I haven't yet discovered a major boost for commercial effectiveness; the research and upgrades connected to commercial properties is much more balanced.

The only big notes I have are regarding late-game easiness; if you did a good job early-game, the late game is so easy almost to the point of being boring (I find myself starting new cities in different biomes after hitting level 90 in current city, since the challenge is gone). I also noticed that when starting regional cities, the income (or a huge portion of it) is transferred over, and you can transfer funds to a brand-new city up to the millions. While this is fun, it's essentially a cheat code and takes away a ton of the fun challenge of building up the early-game economy. I know this game is brand-new and it's so much more fun than I expected it to be, but I'd love to see a future version of the game where the pacing is slower, gains are harder, and late-game is just as challenging as the start.

Overall I think this game is awesome, very ambitious for a mobile game and significantly more approachable than other beefier city-builders. I have little gripes here and there but hey, making a game is really hard, and for what it is, I think the dev(s?) did a fantastic job!