Fun game! I like how for the theme of last stand, you took the wave defense aspect of it but turned into a puzzle game instead. It’s ingenious! The game loop felt satisfying and fun to go through. I like the pacing of progression with more cubes being added in, as it tends to happen, right when getting used to how the current set of cubes moves and turns around the grid.
Playing this admittedly gave me some bit of nostalgia for this one block puzzle game I used to play a ton. I remember how fun it was to go through that and this pretty much hit those same spots for me.
Great game and well done!