Sorry for my late response! Thanks for your feedback! We're planning to continue working on it and the fixed version is coming soon, along with one more level that we didn't have time to finish.
Personally, I didn't encounter any frame rate problems, even on lower-end PC's, but I have to agree that the game isn't optimized well.
The softlock bug was discovered a few minutes after the jam ended, It was somehow missed in the playtesting.
Scene loading animation is sometimes glitchy because I had to patch a bug related to it quickly in the last few hours and ended up layering two of them because of alpha channel issues and apparently Unity didn't like that.
The combat is broken, but it doesn't really have an easy fix. I needed to make the skeletons harder so I made them deflect the sword, which made them too hard.