The lag you're experiencing is likely a combination of factors:
1. Third-party hosting issues - Many unblocked game sites host older versions or use slower servers. The physics engine can struggle when the game files aren't optimized or compressed properly.
2. Browser hardware acceleration -...
Good question! Most unblocked versions of browser games like Drift Hunters are usually the same as the official version, just hosted on different platforms that aren't blocked by school/work filters.
Regarding your save data concern - you're right to worry. Many browser-based games use...