Play Trials of Fire. However, when you reach the 2nd last level, you will find that if you hit the boss only once, his health bar will drop to 0 and he will disappear. Anyone can help on that?
Here is the link to Trials of Fire.
http://www.flowlab.io/game/play/648867
Have a once set the boss’s bar to the starting health, that way, when the level restarts, he stays alive after a hit
Thanks, @jngthree! It helped.