oh yeah
for 1100m, you have to corner jump off of the spikes to reach the wall on the other side and wall jump up.
most of the tricks used in gemskip and trueskip are mentioned here: https://celesteclassic.github.io/glossary/ (check the corner jump section for 1100m)
you need to wall jump off of spiked walls to pass 500m and 800m (check "parity" and "spike jump" sections here: https://celesteclassic.github.io/glossary)