Editing Microvision (section)

===Keypad destruction===
The Microvision unit had a twelve-button [[keypad]], with the switches buried under a thick layer of flexible plastic. To align the user's fingers with the hidden buttons, the cartridges had cutouts in their bottom (over the keypad). As different games required different button functions, the cutouts were covered with a thin printed piece of plastic, which identified the buttons' functions in that game. The problem with this design is that pressing on the buttons stretched the printed plastic, resulting in the thin material stretching and eventually tearing. Having long fingernails exacerbated the condition.  Many of the initial games were programmed to give feedback of the keypress when the key was released instead of when the key was pressed.  As a result, users may press on the keypad harder because they are not being provided with any feedback that the key has been pressed.  This resulted from a keypad used for prototyping being different from the production keypad; the prototyping keypad had tactile feedback upon key pressing that the production units lacked.{{Citation needed|date=February 2012}}