You can increase a player's speed by modifying Humanoid.WalkSpeed within a script.

To redeem these, open the menu and click the Redeem Codes button. Third-Party Scripts (Exploits)

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.

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

If you are building your own Speed Simulator and need to script the mechanics yourself, you can use legitimate methods in :

Many "Inf Speed" or "Inf Money" scripts found on sites like or Reddit are categorized as exploits by Roblox.

If you are playing , you can use active promotional codes to gain rewards like chows and skins without risking your account. 1billion: Redeems a unique "U chow". race to win: Redeems 100 race tickets. my Valentine's: Redeems the Valentine's Amy skin.

If you're looking for a , it's important to differentiate between official game codes and third-party exploit scripts. Official Game Codes