I'm not a speedrunner so I'm not sure if this is the right place to post this but here goes. I would like to suggest adding a Puzzle Storm Category. These can be times for 10/20/30/40 and so on puzzles solved. Timer starts when first move is made.
Here is an example I did for 20 puzzles:
I'd be down to adding something new, I haven't ran any of the level leaderboards but it seems like they are becoming redundant - with 0.01 seconds being unbreakable and many are achieving it (especially in the easier levels).