There are games that have great ideas, but terrible execution. This one I feel is a bit of the opposite.
This game feels great. Everything in this game, from the weapons to rolling to even the crosshair (I love its spinning animation) is really well-polished. However, its theming is a bit weak. Like, there's nothing in terms of mechanics that connects it to the theme. The protagonist is a die, and the crosshair is a square, but that's kind of it.
Basically, this game is a really good game, but I'm not sure if it's a good jam entry.