How To Clear The Games Cache On Android If You Are Stuck On The Loading Screen 

Please note that this differs slightly depending on the device you're using so it might take a bit of digging around to find.

1. Go to Settings on your device (Not the game).

2. This is the step that is different depending on your device..

         * Click on "More" then "Application Manager" or 
         * "Apps & Notifications" or

         * "Apps" or

         * It could be called something else on your device but should be somewhere in the Settings Menu

3. Find Dirt Track Gladiators and tap on it.

4. Clear Cache.

If this doesn't work then as a last resort you could click "Clear Data" at this point and restore your purchases in game to unlock the full version again if purchased.

You can read more about Cache issues on Android Central HERE