I like the little entertainment tricks in the times when you have to wait. This run wastes quite a bit of realtime to improve the in-game time. That's noted in the submission notes, but needs to be noted in the movie/publication notes too. For anyone who doesn't know the rules of this game: most types of block will "glue"/"stick" to other blocks of the same type; any group of 4 or more blocks of the same type will disappear after a short time period when disturbed (i.e. it's just been newly formed, or it falls or a new block sticks to it). Silver X blocks are an exception, they can't be destroyed by normal means and don't interact with anything (thus serve to get in the way). The playable character can destroy a block they're adjacent to (in any direction), move left or right, or climb diagonally up/left or up/right if there's a block to support them; and falls if there's no block beneath them. Brown X blocks take five hits to destroy and come with huge penalties when you do so (varying by game mode; in this mode, I believe it's an in-game time penalty), which is why this run doesn't destroy any of them (even when it looks like it would be faster to do so), except by allowing them to form a disturbed group of 4. Crystal blocks disappear after a short time regardless of whether they're disturbed or whether they're in a group of 4 or more (their main purpose is to cause a player who's trying to play more cautiously than this TAS is to react fast). There are also a few special blocks that do things like flipping or rotating the playfield, or making some blocks into crystal blocks; and timer blocks which directly subtract from your in-game time (and are necessary to get a good score on many levels). In casual play, there's two main ways to play this game. The "cautious" mode is to stay on top of the collapsing pile, trying to drill down through it carefully and letting the pile stabilise before digging further. You can also do what this TAS does, and try to outrace the falling blocks; of course, in Time Attack mode, that's pretty much the only viable way to play.