Hi there! I see you're having trouble with Subway Surfers displaying a "WebGL not supported" message in your Windows 10 WebKit browser. Let's work through this together.

To start, can you tell me which browser you are using exactly? For example, is it Safari, Chrome, Edge, or another WebKit-based browser on Windows? Also, have you tried running any other WebGL-based apps or games—do they work, or do they also show a similar error?

Meanwhile, here’s a simple step-by-step guide to troubleshoot WebGL issues:

1. Enable Hardware Acceleration
WebGL depends heavily on hardware acceleration being enabled. On most browsers, check your settings under System or Advanced Settings, and ensure that "Use hardware acceleration when available" is turned ON.

2. Update Graphics Drivers
Your video card drivers may be outdated or incompatible. On Windows 10, open Device Manager, locate your Display Adapters, right-click on your graphics card, and choose “Update driver.” If possible, visit your GPU manufacturer’s site (NVIDIA, AMD, Intel) for the latest drivers.

3. Browser Update
Make sure your browser is up to date. An older browser version might not fully support WebGL. Go to your browser’s About page and install updates if available.

4. Check Browser Flags or Settings
Sometimes WebGL could be disabled in browser flags. For example, in Chrome, you can access chrome://flags and search for WebGL-related flags, making sure they are enabled.

5. Disable Browser Extensions
Some extensions (especially privacy or ad blockers) can interfere with WebGL. Try disabling extensions temporarily and see if the game loads.

6. Clear Browser Cache
Corrupted cached data might cause issues. Clear your browser’s cache and restart the browser.

7. Try Another Browser
Since you’re on Windows 10 and using WebKit, if possible, try launching Subway Surfers on a different browser, like Chrome or Edge, which have robust WebGL support.

If these initial steps don’t solve the issue, we can dive deeper, such as checking if Windows' graphics settings or system-wide GPU settings might be blocking WebGL.

Could you try these and let me know what you find? If you want, I can guide you through any of these steps in detail.

Are you satisfied with the solution I provided so far?