if you’re playing in offline mode (with bots) they are essentially cheating, as they don’t have a fixed speed limit and are moving at a fixed rate per game tick while your speed is tied to the FPS (oops) and your size so yup true this can and will happen - sorry ;).
if you’re playing in online mode, the server does exactly 0 speed-checking so one could just edit the source code in their client to be incredibly fast and the server wouldn’t mind (i unfortunately ran out of time and couldn’t implement any anti-cheat thingy).