I haven't seen many game jam games developed using Java. The lack of self-running distribution (i.e. one that bundles the Java runtime) might make it hard for others to play. I found the game itself quite interesting, though. My main complaints would be that a) the hitboxes feel disjointed, making it hard to tell where to aim to make the shot, b) aiming was backwards from what I was expecting for some reason, and c) the "release to throw" resulted in the arrow going the wrong way multiple times (possibly due to the springiness of the analog stick). Otherwise, I liked this. I managed to make it a few rounds in this. I did like that you could use enemy-dropped spears once you started to get them (I had 3 spears by the time I lost). The fact that the spear doesn't reset each phase felt awkward, though.