That means you died a lot on your best run. I started off at around 121k today, which would have a lot of deaths too. It’s a hard level, but beat it deathless and you can expect at least 140-145k!
Apparently this was tough for me to manage back then, because my score is almost dead last at the bottom. I guess I'll give it another go at some point later and see if I can improve by at least 10k points.