It seems a number of people had issues with , but personally it worked great for me. The advantage of being able to browse the other entries so freely after they are submitted helps to keep it transparent and is good exposure for Unreal Engine overall. The jam was fun and the theme although short, was interesting to see where people took it.
I will say that uploading the game first and then submitting it to the jam second was a little confusing (why can’t it just be one step?) but as an newbie I gave myself about an hour’s worth of buffer time to submit/upload so it wasn’t really an issue. Although there’s a bit more work in providing collateral (images/etc) to publish, I think the advantage of centralizing all the entries under one platform outweighs the previous setup.
Regarding the server issues/difficulty uploading comments. I understand that net or server issues is something you can’t entirely control; but thinking you can submit your 1GB file within 1 minute of the deadline even with your 1 gazillion byte per second upload — it comes down to good time management, really. You shouldn’t be working to the wire and definitely be smart about your project file size. Having done three of these jams now and trying a few different tactics I can attest that it’s far less stressful this way. 