Will I still be able to play on my t500?

[GNU/Linux/X]

I assume you mean the Nvidia T500 GPU?
I guess it should run decently enough to play.
New tracks shouldn't be more demanding than Black forest, if you can run it just fine right now you will be good for sure, if not you might have to turn down graphic settings a bit for STK Evolution.

I mean the thinkpad T500