A Glitch Abuser in Undertale: Timeline Collapse?

Let me know if you guys think this player Specterknight09 is a Glitch Abuser or a Hacker or just it's really laggy bug in the game. Play the game for yourself: https://www.roblox.com/games/7478475781/3M-Visit-Event-Undertale-Timeline-Collapse check out my Scratch profile: https://scratch.mit.edu/users/Gaburieru4000/\ Join my group: https://www.roblox.com/groups/15536982/Tru2daBlu82-FAN-GROUP#!/about