Cavity

## Description

The player’s goal is to navigate their way through the cave while collecting
various power-ups for points.

As the game gradually increases in both speed and difficulty, the player can
collect a yellow power-up which temporarily stops the speed from increasing.

If the player gets the special item by picking up the blinking power-up at the
right moment, they will be rewarded with a massive boost to their score as
well as an instant speed-down!