falling-nes

Falling is a simple NES game written in 6502 assembly.

This is my first go at both assembly programming and designing an entire game from scratch. Start to finish, the project took 130+ hours over 11 days.

Usage

To play, falling.nes can be loaded into an NES emulator such as FCEUX or Bizhawk. To assemble from source, run NESASM3 falling.asm using the NESASM v3.1 assembler (link below).

References and Resources

• The Nerdy Nights tutorials, especially Nerdy Nights Sound
• The Everynes technical specifications document
• The Nesdev Wiki programming and reference guides

Utilities

• NESASM v3.1 for assembling (source)
• YY-CHR Sprite Editor for creating sprites and backgrounds

Other Stuff

My own docs made during development

• NES Memory Map
• Technical and Programming Reference

Music

• Falling - Title Theme

Changelog

v1.0 [1/6/18]

• Finished original project.

v1.01 [1/10/19]

• Minor refactoring and difficulty tweaks.

v1.1 [11/24/19]

• Smoothed out difficulty curve.
  • Adapted movement code for player, obstacles, and pickups to use a basic subpixel system.
  • Difficulty now ramps up in ~50 incremental steps from game start to reach max speed by 255 seconds.
  • Decreased spawn rates of pickups. Spawn rates also increase with difficulty curve.
• Replaced Day mode music with a new track.