Attack of the Killer-Cave Plotter from the Planet Raxxla!

main.py

"""
Attack of the Killer-Cave Plotter from the Planet Raxxla!

by Nicholas H.Tollervey. Released into the public domain.

Instructions:

Open Mu, put it into Adafruit mode and switch on the REPL
and plotter.

Rotate your Circuit Playground Express device along its X
axis to steer your space ship (the middle line) up or down.
Avoid the roof and floor of the cave.

Press CTRL-D to restart the game.
"""
import time
import random
from adafruit_circuitplayground.express import cpx

steps = 0  # The number of steps taken into the cave.
pause = 0.05  # The amount of time to sleep between steps.
roof = 100  # The reading for the cave roof.
width = 200  # The width of the cave (roof-width=floor).
spikiness = 10  # The amount of spikiness in the cave walls.
power_up = 200  # The number of steps before difficulty increases.
sensitivity = 10  # How sensitive to make the accelerometer reading.

while True:
    time.sleep(pause)  # Pause to make the game run at human speed.
    steps += 1  # Increment the score.
    x, y, z = cpx.acceleration  # Read the X, Y, Z accelerometer values.
    roof += random.randint(-spikiness, spikiness)  # Change the roof value.
    roof = max(-49, min(249, roof))  # Ensure the middle of the cave remains "around" 0.
    floor = roof - width  # Calculate the floor value.
    player_position = x * sensitivity  # Boost the accelerometer reading.
    if steps % power_up == 0:  # If we pass a power-up point...
        # ...then make things a little more difficult.
        pause -= 0.01  # Make the game faster.
        spikiness += 2  # Make the cave walls more jagged.
        width -= 5  # Make the cave a tighter fit.
    print((roof, player_position, floor))  # Output the tuple for Mu's plotter.
    if player_position >= roof or player_position <= floor:  # Has the player crashed?
        break  # Yes! Break out the loop.

# End of game...
print("You crashed!")
print("Score: {}".format(steps))