Sim and management games live on UI feedback, so here are some free resources for it:
- Essential UI SFX: 150 UI sounds (click, confirm, error, notify, coin, purchase...), 5 versions of each
https://willosuna.itch.io/essential-ui-sfx - Sci-Fi HUD Kit Lite: pixel art HUD panels, bars and frames
https://willosuna.itch.io/scifi-hud-kit-lite - Pixel Pickups VFX Lite + SFX Lite: coins, gems and rewards with matching sounds, great for income and upgrades
https://willosuna.itch.io/pixel-pickups-sfx-lite - Pixel Cursors & Icons: 121 pixel cursors and icons for tools and resources
https://willosuna.itch.io/pixel-cursors-icons
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!