Oh, another 2D game from the jam done in Unreal. Interesting !
The old animation "Cup Head" style was cool. The controls were kind of rough tho, the jump was really low while the double jump a lot higher, made the the jump kind of unnecessary since you pretty much always had to double jump.
That being said the lack of credit felt a bit dishonest, I've done an Unreal 2D tutorial using those assets and the main character is clearly this art pack:
https://www.gameart2d.com/ninja-girl---free-sprites.html
So I can only assume the rest of the art is also from an uncredited art pack.