You can increase a player's speed by modifying Humanoid.WalkSpeed within a script.
Be extremely cautious when downloading or copying scripts from unverified sources, as they can sometimes contain malicious code designed to steal your Roblox account or personal data. For Developers (Roblox Studio) Speed Simulator Script – Inf Speed | Inf Money
Using or distributing scripts that grant unfair advantages or manipulate mechanics violates Roblox’s Terms of Service and can result in permanent account bans or other penalties. You can increase a player's speed by modifying Humanoid
Use Humanoid.Running events to reward players with points or speed every time they walk. Roblox Studio: How to Make a Speed Simulator | FULL SERIES Use Humanoid
To redeem these, open the menu and click the Redeem Codes button. Third-Party Scripts (Exploits)
Create a "points" or "speed" folder in ServerScriptService to track and save player progress.