Yeah sorry about that. That's why the game has a big warning at the start. I didn't expect it to get popular yet, so I feel a bit bad that I've disappointed some folks with how unfinished it is, but the final game will have at least one boss encounter (maybe multiple)
I'm actually thinking I might make each playthrough 3 times as long as the current map, so you fight 3 bosses per run, but I haven't fully made up my mind on that yet.