You can toggle the infinity. When turned off, it uses classic step reset behavior instead of modern move reset.
This game has "Lock delay cancel using down key" feature, like the Tetris DS. Touch the ground by using soft-drop key, then push the sort-drop key again to lock the Tetromino instantly.
You can change the settings of buttons. You can even set to "NO ASSIGN". [1]
Modes:
MARATHON:Standard Tetris mode. Level advances by clearing every 10 lines. Game ends after clearing 150 lines.
40LINE:Well-known 40 lines time attack mode.
ULTRA:3 minutes mode.
EXTRA:Endless mode for expert players. After the gravity reaches 20G, the lock delay becomes shorter and shorter. Level advances by clearing every 4 lines.
The game recognizes T-Spins even when they don't clear lines.
Also, the game recognises back to back, but doesn't distinguish between tetrises and t-spins. so if you get 1 t-spin double and 1 tetris, it counts as a back to back. Yes, this means ST stacking is the way to go.