Honestly this game has a ton of potential, at first i didn't even believe it was made only for this game jam since it looks very good.
But it took me very long to even realize what i was suppose to do, and even when i did it seems like the creatures attacking the heart didn't really do anything? Basically i didn't need to do anything and you never lose. I don't understand if its some bug or something since they seem to not even shoot at the heart, but at the ground above them.
Overall i rated it highly, i just wish it was more clear and there was an ending/progression/challenge to the game because as I played it right now you never lose even if you suicide to the underroot creatures.