Ok, so I gave it a try and first of all even tough the tecnical difficulties you had, good job on being able to submit for the jam, is this your first time?
Then well it looks to me like you already know the game isn't great, but I hope you've learned a lot by making it, that's what gamejams are for, anyway, I felt a bit disoriented, having a clear objective in this type of games is really important and I was really confused also by the fact that by falling down the level would change.
The player movement was a bit rough, it felt like one of those rage games where the character controller is against you, I don't know if that's what you were going for; I also think the platforms might need some work as some got stuck and stopped moving and maybe if they were a little bigger they would help to make the game feel a bit less punishing.
I noticed I'm the first one giving you a rating for your game so I have another suggestion for you: make a web build for the game, it should be possible to do so in unreal, that would help you get more ratings cause people wouldn't have to download the game to play it.