Ah yes it would have made it easy. One thing I remember reading is that try not to allow the player to blame the game for their lack of skill. So I would say if you can make it easier by better controls do that. Then think about making it more difficult in another way.
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You have to be careful also with what seems easy as the developer might not be so easy for the player since you most likely have been playing it a lot while testing. Ah here's an idea I just thought of! In the easiest mode allow the player to hold the key to move. Then as it progressively gets harder make them start hitting the key to move. So that might be a good way to make it more difficult.