Having gone off on one somewhat about the fetid pile of toss that is Rage of Bahamut yesterday, it's only fair for balance's sake to talk about a free-to-play game that is well-designed, player-friendly and actually rather fun.

I am referring to Pocket Planes, the newest game from Nimblebit, developers of the astronomically popular Tiny Tower, a game which made "tap, tap, tap" gamers out of even the most jaded hardcore members of the games industry.

Tiny Tower, as most people realised after varying amounts of time, was little more than a mindless busywork generator, as RedSwirl over the on Squadron of Shame Squawkbox puts it. You built floors, you attracted people, you stocked up your floors with stuff that made money, you went away, you waited for your phone to shout at you that something needed restocking, you tapped on it to restock it and repeated the entire process for more hours than you really should until you either keeled over dead or got bored.

Tiny Tower, then, had very little in the way of strategy and certainly wasn't a modern-day SimTower, as some referred to it on its original launch. It was an interesting little timewaster with an adorable pixel-art aesthetic, however, and crucially, it allowed the player to make progress without battering them over the head to invite friends, share achievements or purchase things with real money every five minutes. The game featured a premium "hard currency" that allowed you to do things quicker or rapidly acquire more cash, but it was handed out fairly generously just through play, so those who wanted to play for free could.

Pocket Planes builds on this formula and puts a more complex game atop it. There's still not a huge amount of depth there, but it's definitely more than simple busywork now.

In Pocket Planes, you run an airline company, and your goal is to own all the airports in the world. (This alone distinguishes the game from Tiny Tower, which had no long-term goal besides "build a fucking huge tower") You begin the game in one of several regions around the globe with a small fleet of rather crap planes and a desire to make money. Fortunately, there are plenty of jobs waiting for you that want to give you money, so getting started is a simple matter of loading up your planes with passengers, cargo or both (depending on what type of plane it is) and setting them on their merry way.

It's here that an element of very light strategy comes into play. Sending your planes off costs money, and you don't receive payments for flights until they're completed. To be efficient, you might want to try and hit several stops in a single run, but when doing so you need to note whether there's a big enough profit margin to make it worthwhile. Sometimes leaving passengers behind rather than fully loading is more profitable, and scoring a jackpot of customers who are all going to the same place nets a 25% bonus on the income attained.

That's it for the basics of gameplay. Beyond that, once you've earned enough money you can purchase new airports, which allow your flights to go further afield and also provide you with plane parts which can be subsequently assembled into new members of your fleet, assuming you have space for them. Old, crap planes can be retired to make room if you don't have the capital to expand your fleet's maximum size, or you can simply try to get as many aircraft in the air as possible. Plane parts and complete planes can also be purchased through the Market page, which restocks with a random selection of items every few minutes, and parts can also be traded with friends for a small fee.

Like Tiny Tower, a lot of these actions use the game's "hard currency", or "Bux" as they are known, but again like its predecessor, Pocket Planes is generous about handing these valuable commodities out through play. If anything, Pocket Planes is more generous than Tiny Tower, rewarding the player with Bux simply for completing certain jobs, levelling up and various other actions. Sometimes they even just float past the planes in flight, to be collected with a simple tap.

Pocket Planes also includes an interesting social mechanic in the form of its "Flight Crew" system. By simply typing in the same crew tag as other airline tycoons, players can team up in an attempt to complete as many jobs in special global events as possible, with flight crews ranked on a worldwide leaderboard and prizes awarded when the time expires. You can also see how you stack up to the rest of your crew and figure out who needs to pull their weight more — though those players who join your crew but aren't on your Game Center friends list simply show up as anonymous benefactors, which is a shame.

The interesting thing with Pocket Planes' social mechanics is that it assumes the player already knows how to socialise. There are no screen-filling exhortations to share achievements with friends; no "friend gating", where progress becomes impossible unless you have a certain number of friends playing; no demands that you "visit" friends and "help" them. In fact, the game's social mechanics are kept pleasingly minimalist — most screens offer the facility to tweet a screenshot using iOS 5's built-in Twitter functionality, but in the case of Flight Crews and the like, it's up to the player to encourage their friends and acquaintances to join in the fun however they see fit rather than spamming them in-game. This is a Good Thing.

Pocket Planes is, at heart, a simplistic game with very little substance, but it offers the same sort of idle satisfaction that Tiny Tower did with a bit more sense of structure. It will undoubtedly be another big success for Nimblebit and fair play to them for that — their recent games are proof that you can adopt a free-to-play business model without being jerks about it. The goodwill that builds will likely encourage many more people who wouldn't think to purchase virtual goods otherwise to dip into their pockets purely to show the developer their support.

Pocket Planes is out now for iOS. An Android version is following in the near future, but a release date hasn't been announced yet.