http://www.revival-studios.com/?page=136
Cavity (2012)
Your goal is to navigate your way through the cave while collecting various power-ups for points.
As the game gradually increases in both speed and difficulty, you can collect a yellow power-up which temporarily stops the speed from increasing.
If you get the special item by picking up the blinking power-up at the right moment, you will be rewarded with a massive boost to your score as well as an instant speed-down!