Once making the game is soon became painfully obvious every level was possible with just one block if the player was good/patient enough.
Snake: Arrow keys
The original idea was for Ludum Dare Mini 63 where the topic was to make a fusion between two games. I thought about merging a platformer with the original snake game. The player is able to stand on the snake and use this to make new paths. However as I said above once the player worked out any level would be possible with a snake of size 1 the idea become pointless.