If you like the idea of going peep bowling on your phone, then I present: the original RollerCoaster Tycoon, albeit with a more mobile-friendly interface and a reasonable one-time fee.
If RollerCoaster Tycoon World taught us anything this year, it's that sometimes you really just can't beat the thrill of the original. And given that Atari had already copped flak for bastardising RollerCoaster Tycoon 4 into a Dungeon Keeper-esque nightmare of microtransactions, there was only one sensible option left: do what Frontier did.
Available on iOS and Android now (although the latter seems to be restricted to an odd set of devices; I can download it onto a Sony Xperia Z5, but not on the superior LG V20), RollerCoaster Tycoon Classic comes with all of the original content from the first and second RollerCoaster Tycoon games.
Beyond the $10 asking price, the only in-app purchases are the Wacky Worlds, Time Twister expansions that were released for RCT2. The Toolkit ride designer and park scenario editor is included as well, but the Added Attractions or Loopy Landscapes expansions aren't listed.
Interestingly, the mobile version of Toolkit will allow users to import saved parks and creations from RCT2 on the PC. That reminds me a little of how you could copy your KOTOR save from your iPad to your PC, and vice versa.
Since it's not available for my device, I can't tell you how it plays. If you've got an iPhone, or a compatible Android handset, let us know how it goes. The RCT3 port worked real well on mobiles, but for pure nostalgia value you never could beat RCT2 with the expansions.