Thank you for playing! I'll try to add the sine animation for whenever the enemy is idling. For the twitch, can you explain that a bit further? I had an issue with that in development.
To catch twitching, you should slightly tap A or D. How to fix it? You need to round the current angle of the cube to an angle that is divisible by 90 without remainder. "angle MOD 90" or something like this.