Nice game! It was tough to figure out the mechanics, but once I did the last few puzzles were a good challenge. I think if you want the player to stumble upon the mechanic like in level 9, it might be easier if the options in the level design is more restrictive so the player has an easier time finding it. I liked the art style a lot! And the grid system works really well. In the future I could see a level editor for a game like this, along with blocks that break the chain up into 2, or blocks that destroy the first player they touch. Great job for the jam!