Good game, but it was a big mistake to let the keyboard be a controlling component and for Kongregate to make a badge centered around the keyboard controls.
Reason? The movement threshold has to high a minimum and to low a maximum. Also most keyboards are no conducive for diagonal movement with the arrow keys (due to electronical mapping).
Personally I didn't have any issues with the game glitching. I get the feeling people who postedthings like this, "OMG suckzor graphics", are just kids who wouldn't know a classic arcade game from an XBOX 360 if it weren't for the dated graphics.
Good relaxing game, loved the feel, but if you want to sit for an hour and play this game, probably not for you.