Use the arrow keys or WASD to move around the grid. Dodge bombs as they appear. If you fail to dodge a you will lose some health. Lose all of your health, and you die. The grid expands over time. The larger the grid is, the more bombs spawn. Collect power-ups when they spawn. Coins give some points, hearts give back health, and prisms can double your points gained for a short time if you collect enough of them in a row. If you collect a heart while your health bar is full, you will get some points instead. If you manage to not take any damage before the grid expands, you will get a large amount of points. If you dodge a bomb at the last second, you will graze it. Grazing a bomb will earn you a small amount of points, but it's risky. Good luck! You will need it.