So the thing is...I actually haven't really gone back to the game to try to get to the other bosses (other than the hydra which I beat). I'm afraid the incentive for getting to the end has kind of diminished a lot after trying so many times to learn the game and playing through the start so many times... At the moment, with the current content and pacing, it feels rather tedious to go through the start of the game. I tried to casual dive back in and keep restarting so that I could see a different boss, but there's no room for casual play! It can be a harsh (but very rewarding) game! Are the other bosses very different than the hydra, or is it just some stat differences? I kind of assume that I can beat them if it's just different stat allocations.
One thought I had was that, maybe you could have a "easy" or "casual" mode? More health, more items slots, and a shorter endpoint maybe? That way, people can experience the game more fully, and hopefully build up some knowledge and strategy as they go along without needed to restart as often. Then, there's the "normal" game for a challenge. Doing this has drawbacks though, like maybe that easy mode will show too much of the content so people might not be inclined to play the normal mode, or, that people will play the easy mode and think the game is too simple and not want to bother playing normal mode and experience the challenge, which is kind of core to the game.
Oh, you mention randomness. I don't know if this helps, but a really really vague feeling I have is that I think that maybe I lose about 1 in 4 games because of randomness. I'm not sure if that's really near being true or just me not being that good, but that's just the feeling I have.
Oh, hm, I don't think I've seen a ring yet. Though...I haven't been trying for the end game much...
But for sure I'll be trying out the game as it develops, and with your updates! I look forward to seeing how it goes, and good luck!!