Having only a few levels and bosses, it's still great for early access. It's FAAAAAR from being finished, and I mean that in a good way. The original only had two biomes available in early access to start, and they have made many improvements based on community feedback. SuperGiant has always been good about building things carefully, and they take constructive criticism to heart. You have plenty of time to add your own feedback to improve an already impressive game.