When running this application on my computer with Nvidia GTX 965M graphics card, it appears to be very laggy. By using task manager, I figured out that the utilization of dGPU had never reached 100%, but stuck at 55% just like a pool of peaceful water. 

I have ruled out the possibility of the computer's fault, because ANY other applications can easily raise utilization to 100% when needed, such as passmark performance test and Battlefield 2. 

Something interesting was that, it would be smooth when running on iGPU (Intel HD 520), simply reaching 60 FPS, while the animation on home screen (the one with play, store buttons) would be laggy on dGPU. However, this doesn't happen on my other computer which uses GTX1050 as dGPU.

I believe something must have been wrong in the code, making the game unable to utilize Nvidia dGPUs correctly. 

Fun fact: I have also tried 1.14, which is definately before the Nvidia RTX upgrade. It would still lag, but dGPU usage can always reach 100%.