well, i replayed it and i didnt had this problem, you should retry, also you have to HOLD the morph button and go down left, if you hold it for less than a second you will not have the time to pass trought it
I don't know if you're running a different build, but if you are you should switch to the executable from the link. I'm on Windows 10, and it definitely does not work. Here's video of me trying to get through it, holding down-left and holding morph.
Hey, I just deployed a fix! Thank you very much for your detailed report and video, it was very useful. If you encounter any other problems, please let me know (but should be smooth sailing from here)
