Rush - Puzzle games and solo brainteasers

The first 4 in this collection can be played either solo or as multi-player competitive games.  Genius Square, Katamino, and Rubik's Race are 2-player race games, but Buildzi can play up to 4 players.  The rest of the items in this collection are levelled brainteasers for one player.  (For an explanation of how levelled brainteasers work, see