Great logic but bad programming – Sokoban Game Review

This game would be really good if the crystals worked properly. As it is they will suddenly stop moving and then you can walk through them, or you'll somehow manage to pick up one somewhere else on the screen and drag it as you walk - it will even go outside the game area. Very frustrating as it usually means you have to restart the level. I still haven't got past level four because of this bug.
Review by Zandonah on Sokoban Game.