I managed to reproduce the issue of poor performance. If you have a gaming system but don't have hardware acceleration enabled in your browser you might encounter stuttering and input lag. This seems to be an issue related to the heavy post processing effects and the use of 3D graphics.
Normally I would point to downloading the desktop version to work around this but sadly I messed up the upload of that so the file might not work and since the game jam is currently in its rating process I am not allowed to replace it.
After the jam is over I will update the itch page with a working desktop version that should work on more devices. Sorry for the inconvenience.