•Operating System (OS): Microsoft Windows 7, 8 or 10 (64-bit only)
•Processor (CPU): Intel Core i5-2300 (or better), AMD FX-4300 (or better)
•Memory (RAM): 8GB DDR3 Ram
•Graphics Card (GPU): Nvidia GTX 560 / ATI Radeon 7850 2GB (or better)
•Storage Space: 6GB
•DirectX: Version 11
https://www.frontierstore.net/planet-coaster-earlybird.html
And this is directly from Frontier's website. On Internet Explorer, the address bar is highlighted green with a padlock, which is proof enough it's from Frontier.
These system requirements may be subject to change. The AMD Radeon HD 6900 series is quite old. My old laptop which I got in 2011 had this kind of graphics card. But you should be able to get away with playing it on Low settings. The 6900 series does not meet the AMD 7850 requirement and 8GB RAM is sitting on the low side too. If you want to play it in 1080p High I'd recommend a GTX 970 or AMD Radeon R9 390 with 16GB system RAM to be on the safe side, especially when you have a Windows OS running in the background.