This isn't bad, but the developer is posting updates fast and furiously right now, sometimes more than one per day. It might be prudent to hold off on this game until it's actually finished and doesn't need daily updates. 😒
I'm at the end of the game now, I'm at the last boss, but if I finish it, I think the game will end and I'll have missed a lot of stuff (a glass piece, several rings, etc.) If you haven't started playing yet, I'd recommend waiting until IGG can post a newer version (1.4.5+) which includes things like better maps that help avoid missing half the game.
(I was right, beating the boss locks off the game and makes it impossible to get the rest of the stuff without starting over. This is now up to 2.0.7 which has some of the quality-of-life improvements, but it's still difficult/impossible to find the glass pieces and rings and stuff. This game needs a walkthrough or something. 😕)
https://www.youtube.com/watch?v=DOkisxKsoTg
https://youtu.be/mH8fIRy18Gg