I have the following problem:

My game supports multiple powers, that you can use when you want, or even mix them, I currently assigned them to the numbers on the top of the keyboard.

After so much time playtesting, I ended developing high skills in playing my own game, and several of my new tactics involve mixing powers, but I found that I keep pressing incorrect buttons, or that I need to pause, look at the keyboard, and unpause, or I plainly press the wrong button (like, I try to press 5, but press 6 instead).

I already expected this when I made the keybindings, but I don't found how to solve...

How I fix that?

I have the following problem:

My game supports multiple powers, that you can use when you want, or even mix them, I currently assigned them to the numbers on the top of the keyboard.

After so much time playtesting, I ended developing high skills in playing my own game, and several of my new tactics involve mixing powers, but I found that I keep pressing incorrect buttons, or that I need to pause, look at the keyboard, and unpause, or I plainly press the wrong button (like, I try to press 5, but press 6 instead).

I already expected this when I made the keybindings, but I don't found how to solve...

How I fix that?

EDIT: The game is a fast-paced action game, or arcade game... (you know, not necessarily on a genre, except it is action, and you aim for high-scores), so I cannot use random keys, I really need to allow the players to press the keys REALLY fast, ANY key that they need to press.