I made it to this room, but couldn't get past (30-50 attempts). To be clear, I'm not great at precision platformers, so that's partially the issue. The dash mechanic hadn't been officially introduced, so I'm assuming that the level is beatable without it, but I was getting stuck even with it. The main thing I noticed is that the spikes have a very large and unforgiving hitbox, I kept clipping them on the corners.