Mono gameplay:

Hit colors. Dodge greys.

Midway 5 Overloaded:

Five lane gameplay.
Grey blocks stay in the grid for about 5 seconds since the last grey hit.
Filling the grid with color blocks extends Power pellet duration.
Should another Power pellet be in the section converted to ghost blocks, it can be chained to extend the current section duration for massive scoring.
Since greys stay in the grid, and there are plenty of them in your way, it is possible and easy to overflow, which empties the grid without scoring.

Good luck...