Yes, it is now possible to reset your Merge Mansion account by yourself!
Remember that resetting your game will result in the loss of all of your previous progress. If you decide to restart the game, keep in mind that focusing on completing the tasks on the Task List will help you progress faster. Collecting XP Stars, Bronze Coins, and Energy Balls by double tapping on them will also help you keep your Garage Board more manageable.
You can reset your game by going to the main screen's 'Settings' menu and clicking the 'Reset Game' button in the bottom right corner of the pop-up window.