Bishi Bashi Special is a game that's similar to Salary Man Champ, being a collection of mini-games with a variety of rules.
This game has two modes, the main mode and Time Trial mode. Time Trial mode features the car level from the main mode as well as a lot of original levels where a button must be pushed over and over as fast as the player can, aptly nicknamed "button mashers".
Spikestuff runs through Time Trial mode, aiming to get the highest score in each minigame with in-game time as a secondary goal. For more details, see the author's comments.