Today's patch (v1.44b) adds a few more graphical options for player comfort.
These can all be found in the Visuals section of the in-game options menu.

1. VERTEX WOBBLE can now be enabled (default) or disabled
2. TEXTURE STRETCHING can now be enabled (default) or disabled (this setting is hardly noticeable on the campaign tracks for the most part, but might be quite noticeable on some mod tracks)
3. GAME RESOLUTION now supports a "native" option to run the game at your window/screen resolution instead of the simulated Sega Saturn 1x and 2x resolutions.