Hi! Thank you so much for your valuable feedback, you need to find the key in the level, once you take the moving platform you will find the key asset above there is also a bat that will teleport you back so kill it before it touches you (the range is a bit higher so you can kill it before it touches the player), the Press E (key icon) will only open with the key asset.
And thank you again for the feedback about the consistency it's due to the short time frame and it's completely alright, I appreciate the honesty! (◍•ᴗ•◍)