Yes, you can. All you have to do is to do following steps:

 

1. Go to ⚙️over the upper-left side of your screen.

 

 

2. Tap on CONTROLS button over the top bar.

 

 

3. Tap on CUSTOMIZE button to open HUD customization section.

 

 

4. After you adjust the position and size of your buttons, tap on SAVE AS button on the upper side of your screen to save your changes.

 

 

 

There you go! You can keep customizing the position and size of the buttons anytime you want by following the same steps.