I got an average of 220fps. Maybe you should cap it at 60 or something. I also got the same problem as Seppuku.
No offence, but you really should show us that the sim works... I mean what about the money, and placing the rides, and the people and all that? If you haven't gotten that far that's fine, but from what you've said it sounds like you have.
And could you show us some in game screens where something's actually happening? I mean, all you've shown us is that you have the models, a basic menu, and a rotating and zooming camera. I'm not trying to say you haven't shown enough progress, I'm just saying you
sound like you’ve done more, but you're not showing it.
And I hope Theme Park Simulator is just the description and not the final name...
Well, good luck. I love theme park simulators, so I really hope you succeed.