Ceramic cup: yanin — Specialty Coffee & Pastries FREE SAMPLE (48 sprites).
Source: https://yaninyunus.itch.io/16x16-specialtycoffee
Commercial/non-commercial project use and modification permitted. Do not resell or redistribute the asset pack, even modified.
Used only the top-left 16x16 cup cropped from the free sample; no paid assets used.

Chimney smoke: Weissnix — Smoke and Explosion Animations.
Source: https://opengameart.org/content/smoke-and-explosion-animations
Original: https://opengameart.org/sites/default/files/Smoke.gif
License chosen: CC BY-SA 4.0 https://creativecommons.org/licenses/by-sa/4.0/
Modification: GIF frames converted to a horizontal PNG sprite sheet, original pixels preserved.
The adapted chimney-smoke.png is distributed under CC BY-SA 4.0. This attribution and license concern that artwork, not unrelated game code or other assets.