New Star Stable Online update came out with snow all over Jorvik. In their requirements for that, they say GPUs running 4.0 or LOWER won't be able to handle it.
I checked my hardware info and this is the information I got:
If your GPU driver, mesa and Wine are all up-to-date, then I don't think there's a lot more you can do, in terms of 'improving' the performance of OpenGL. If you're not getting good results, you could try DXVK, which uses the newer Vulkan API instead of OpenGL. (I'm not sure how easily available it is on Mint though)
It might also be a limitation of your GPU - the one you have seems to be an integrated laptop GPU with shared memory, so you might be asking too much of it.
'your-prefix' should be the path to your Wine prefix, i.e. the folder that contains the Wine installation you are using for the game. Usually, it would be something like ~/.wine32 . Note as well that it should be an absolute path (so you'll need the full /home/USERNAME/ etc.)
Thinking on it some more though, if the game has specs for OpenGL, then it is probably running on OpenGL in Windows, in which case DXVK probably won't work, since it translates from DirectX to Vulkan. It might still be worth a try though.
If not, then you might need to look at upgrading your hardware.