I went into this with 0 game dev experience and I had also never played granny. I have been trying to get what I have submitted for a few hours now and it is pretty hard. I was finally able to get the project packaged successfully and I was able to open and play it from the actual package file. Then I saw it has to be playable in browser but I have not been able to get that to work with unreal. I got the plugin that apparently is needed but then the project failed to package. I ended up just going with the original version but I am not able to play the downloaded version from the website....... This is frustrating. But I did what I could. I don't think it will be playable for anybody and I have no idea how to fix that. I'm sure it is disqualified for not being in browser plus I can't even get it to work. Couldn't even upload the screenshot I wanted for the thumbnail because it is like 3 times too large of a file..... This was pretty much just a complete and epic failure on my part but I did what I could and submitted what I had even if it isn't working in the slightest.... woohoo...
