OpenRCT2 is a fantastic reimplementation of RollerCoaster Tycoon 2 and the team are doing a survey to gather some feedback on how it's used and where to focus.
Currently, OpenRCT2 is already fully playable providing you have the existing game assets while they work on a set of free replacements. Lots of advancements over the original including UI themes, fast-forward gameplay, multiplayer support, improved translations, OpenGL hardware rendering and of course Linux support. It's constantly being improved too with a new release out back in April and another is coming soon with plenty more enhancements.
While playable and fun it's still far from finished. Back in 2016 the team ran a survey (results here) that showed a large portion of players on Linux. They've put up a fresh survey you can find here if you're a player or someone wishing to use it, you can give them some feedback.