Can you list what your hardware is and its specifications are?
If you are on PC you should be able to force the game to use OpenGL instead of Vulkan.
The web version unfortunately doesn't perform well & I haven't been able to successfully fix the performance, no matter how hard I tried. That might be an engine related issue.
Oh, are the old versions massively different? I understand that this being a small itch game might not make it that important to you, but perhaps by making a "Lite" version, t=you could fix these issues. Maybe even have the light version of the game as the web version, idk. I'm Pikkewaan btw (Pic-eh-vahn)
Technically and gameplay wise, things changed quite a bit over time. A lot of systems were reworked as the engine evolved, especially around rendering, physics, and input handling.
The older versions aren’t just lighter builds of the same game. They behave differently under the hood, and backporting or maintaining a separate Lite branch would essentially mean supporting two games at once.
For now I’m focusing on keeping the main version stable and consistent across platforms. The downloadable build is the intended experience performance wise, while the web version is more of a convenience option.