Love the concept so far, and I would also agree with BadBackGames review. I struggle with keyboard dexterity with the left-hand as I can't focus on the numbers while controlling WASD at the same time. It's why I prefer controller support. Though, it is also beneficial if the switching can also occur on the numpad too. That way, while the left-hand focuses on the main movements, the right-hand controls the switching on the numpad.