Hi, sorry to hear that. I don't remember having any speed problems but was playing on a powerful PC. I assume you are playing on Windows. Have you tried changing the graphics settings in the game?

I'd try setting the display mode to Fullscreen and turning vsync off. If that's not enough try setting the resolution to something lower.

It's pretty light on graphics resources, but still heavy compared to the first 3 games IMO (Trails in the Sky FC/SC & 3rd).

I think fairly modern decent integrated graphics should be sufficient to run the game at maximum settings at 1920x1080. I run at 4K on my integrated GPU (AMD Cezanne core, so think Ryzen 7 5700G) though some concessions need to be made (no AA for example and I get dips down to ~50FPS).

Looking at settings that seem to make a difference to overall performance, I found disabling the following to give me a noticeable increase in frame rate:

Anti-Aliasing: off (even FXAA causes a pretty big drop for me)
Water Shaders: off (small drop so I actually leave this on, though you might only notice it in certain areas like the fountain)

It's likely more performance will be gained turning off Anisotrophic Filtering and Dynamic Shadows.

I myself can't stand not having Anisotrophic Filtering (blurry textures in distance) and Dynamic Shadows doesn't really make to much of a difference except for certain areas (I think from memory the theme park had some performance drops with Dynamic Shadows).