I like the use of Unreal on this 3 day project. It ended up looking and feeling pretty decent, as a result! I agree with the previous comment about sound, as well as the desire for platforms to be more interesting. There were times when I seemed to jump higher, and I thought that could've been because the platform was different in some way (though, for the life of me, I couldn't tell them apart). Having tiles that boost you, or have semi black hole gravity that takes a couple jumps to break, could make the gameplay more interesting.
It was also a bit hard to tell when the black hole was coming, even with the meter there. I feel like there's more that could be done visually on the screen to show that impending doom is coming. I almost got that feeling seeing the shadows on some of the platforms getting dimmer as it grew closer, but the darkness of the hole clashes with the darkness of space. Making the background a slightly different color so that the hole stands out a bit more could be helpful.
A fun game overall all though, great work! 😃