It was hard to find the path, for me. Certain sections ran on their own, but unfortunatelly also got locked on their own. :)) I think this is a great level! I had special trouble, finding the last two steps for 251.
Enjoyed it a lot, though it seems terrifying, at first glance.
Lol that unintended 2 save. Quite a surprise; haven't been back to the event horizon for 5 months but don't be afraid to cross it; no singularity inside!