You can delete your SlowMo Dash data directly from the game.
Open SlowMo Dash and go to:
Settings → General → Delete Data
Tapping this button deletes your data immediately.
If you signed in with Google Play Games, deleting your data removes your leaderboard entry (display name and score) from our backend immediately.
Settings, statistics, and progress stored locally on your device are managed separately and are not affected by this backend deletion.