Unforunately I can't recover your save. Due to the poor way I was previously saving data, the deserializer just times out because there's to much to work through.
I've fixed how saving works now so it should work from the beginning, but if anyone is also experiencing this issue (And because the game's still a bit buggy), I've uploaded V1.31. This version has a dev command to toggle gravity, so you can skip puzzles you've already done. If anyone sends me a DM on Twitter, I can pass you the command.