For the game to run correctly via PortMaster, you typically need the sourced from platforms like Steam or the Humble Store.
PortMaster uses a compatibility layer to run Mono-based games (like Timespinner , Celeste , or Stardew Valley ). Using the specific v1.032 version ensures that the internal game logic aligns with the scripts and libraries provided by PortMaster.
For a detailed walkthrough on setting up Timespinner on your handheld, including where to place your game files, check out this guide: Guide: Timespinner on Retro Handhelds (PortMaster) Retro Game Corps YouTube• Apr 20, 2022