JumperJack

JumperJack is a two-player timing game built with Python and Kivy.

Each player launches a ball and tries to maximize its travel distance. The game uses a single A button whose function changes according to the current state:

• Start the launch sequence
• Perform the launch JUST timing input
• Activate GO POINT boosts

Features

• Two-player alternating turns
• Configurable round count
• Random LEVEL selection
• Three GO POINT opportunities per launch
• Real-time distance tracking
• Dynamic terrain rendering
• Camera tracking
• Debug mode and hitbox visualization
• Separate flipper artwork for PLAYER 1 and PLAYER 2
• Score and result screens

LEVEL Rules

LEVEL	Name	Velocity Retention
1	LOW	0.995
2	MID	0.985
3	HIGH	0.970

A LEVEL is selected from the MENU with ROLL LEVEL. The selected LEVEL applies to both players and all rounds in the current match.

Controls

PC

• Space: A button
• F1: Toggle debug mode
• H: Toggle hitbox display
• R: Retry during prototype testing

Android

Use the on-screen A button.

Run on PC

python main.py

Project Structure

JumperJack/
├── main.py
├── screens.py
├── session.py
├── game.py
├── settings.py
├── debug_controller.py
├── buildozer.spec
├── requirements.txt
├── README.md
├── AFTERWORD.md
├── LICENSE
└── assets/
    ├── images/
    │   ├── Flipper.png
    │   └── Flipper2.png
    └── modes/
        ├── icon.png
        ├── title.png
        ├── menu.png
        ├── score.png
        └── end.png

Status

Current version: v2.1

• Android APK build confirmed
• Tested on Android 10
• Desktop debug environment available