1-bit games lean hard on sound, so here are free sound packs that fit a monochrome Halloween game (plus pixel fonts that work in any single color):
- Horror UI SFX Lite: creepy interface sounds: clicks, whispers, heartbeats, stingers
https://willosuna.itch.io/horror-ui-sfx-lite - Retro Arcade UI SFX Lite: 8-bit menu and pickup sounds with real bit-crushed grit
https://willosuna.itch.io/retro-arcade-ui-sfx-lite - Pixel Combat VFX Lite + SFX Lite: explosions, hits and slashes with matching sounds
https://willosuna.itch.io/pixel-combat-vfx-lite - Pixel Fonts Lite: pixel fonts as TTF + BMFont, with accents
https://willosuna.itch.io/pixel-fonts-lite
Sounds come as WAV + OGG, graphics as transparent PNG. I made all of these myself, drawn and synthesized from code: no third-party art or samples. Free for commercial use; a credit to Willosuna is appreciated.
Good luck with the jam!