While the faux-retro isn't perfect, it's fine for a jam game. Getting a perfect look takes a lot of time, and this was a one-week jam. Downgrading graphics can be difficult. I'm quite familiar with Unity and I wasn't able to get Beach Defend 2000 to look quite the way I wanted it in the time I had.
I tend to like really bizarre, weird games, especially in this jam. The epitome of a "so bad it's good" game, in my mind, is one that makes me go "WTF did I just play" but also "let's do that again". I actually feel that every game I've made for SBIG Jam, including this year's entry, has been too conventional. I think next year I'll try to do something really weird.
How is Unreal's UI system? I have mixed feelings about the one in Unity.