Console-based tetris.
-l (1-29)
/--level (1-29)
- defines the level where game begins.-g
/--ghost-block
- starts the game with ghost block turned on.
- ←→/AD - move block
- ↑/W - rotate block
- ↓/S - soft drop drop
- SPACE - hard drop
- C - hold block
- E - turn on/off ghost block