Submission #9051: DigitalDuck's ZXS BMX Jungle Bike in 03:01.11

BMX Jungle Bike is a game about riding a BMX bike through a jungle.

This is a tool-assisted speedrun of BMX Jungle Bike for the ZX Spectrum. It completes the any% category, completing the game as quickly as possible.

TAS timing (power on until last input): 9070 frames, 3:01.327

RTA timing (press 1 to start the game until "WELL DONE YOU ARE THE NEW BMX JUNGLE BIKE CHAMPION NOW TRY AGAIN" appears): 1359 frames, 0:27.169

The run is performed on the Sinclair ZX Spectrum +2A. BMX Jungle Bike does not attempt to control its framerate, it simply processes the game as quickly as it can at all times. 128K versions of the Spectrum run their Z80 processor at a slightly higher clock rate, and the +2A and +3 also have some improvements in memory access speeds. As a result, the game runs fastest on these models. The +3 is a disk-based system, and BMX Jungle Bike has never been officially released on disk, so the run uses the +2A and loads the game from tape.

We start by choosing to play with Sinclair joystick, and pick the hardest difficulty. The difficulty selection controls the number of enemies that appear,

This would be a fairly normal game, go fast and jump over obstacles. But for some reason, pressing or holding the jump button while in the air makes the game skip all processing except for our character movement. This makes the game run much faster and also makes us invincible. However, we're not immune to large gaps, and we're still vulnerable while touching the ground, so we do have to slow down sometimes. We also have to make sure to let the game process screen transitions, otherwise we're stuck looping the same room over and over again.

85.7% of this movie is spent loading the game.

Special thanks go to Sir Clive Sinclair for making the Spectrum, and everyone in the Speedtrum Specrunning community for keeping da speccy alive.

DrD2k9: Claiming for judging.