I just added a beta branch for people who have already purchased Jimmy and the Pulsating Mass. This beta is running Jimmy through a program called mkxp, which is hopefully going to improve performance and give a few quality of life improvements. My big hope here is that if you've run into the Large Sprite Fix crash, this will fix that. At the very least, it should improve the frame rate for those people who have frame rate issues, and it gives a few quality of life fixes, like the window is now resizable and the F1 menu isn't as confusing. Let me know how it handles controller support now as well.
This is also a more up-to-date version of the game, so the majority of the outstanding bugs have been fixed here, but I'm not going to list them since this is a beta; I'll list them once I update the main client.
There are also a few known issues with the beta. Your save files might be missing the face graphics; this will fix on new games and probably when you change your characters. You'll also notice that there's a new font; the font I had wasn't compatible with mkxp, so you'll have to get used to the new one if you use the beta.
Finally, instructions! In order to switch to the beta:
-In the Steam client, right-click on the game's title from the library page and select "Properties."
-Click the "Betas" tab.
-Select "beta" from the drop down menu. There is no code.
That's it! Please let me know how it runs, especially if you've had framerate issues and/or the Large Sprite Fix crash.