There is a little problem. When you use non default keys for platform you have to simulate the behaviour when pressed. Also, 1 pixel is way too little length, even for gameboy resolutions. One more thing: If this is a platform and your sprite is facing, let's say right, you have to mirror it when you press the opossite direction key.
Check my example:
Now, if you are using the top down RPG perspective (Zelda style), use the 8 direction behaviour instead, where you will have to use different animation for all directions (non mandatory).