Ok, had to actually revisit the stars I gave you. At first, it felt near impossible to get the boss down and smash him, once I figured out the timing and that you need to hit the block button to smash his head on the ground and not the attack button, it was relatively straight forward. The time it took made it rewarding in the end. Nicely done! And the line at the end - poetic!
The combat mechanics need some thought if you plan to develop this further or if you plan to come up with new games in the future though. It is impossible to win when you don't have the timing down and too easy once you figure it out.