I really enjoyed your game. I can tell a lot of love and detail went into this. The opening sequence was well done, and I understood the story without any dialogue. Very solid opening. Now to break it down a bit...
THE GOOD:
1. Combat is fun and attacks seem to connect. I love how there's a horizontal and vertical attack. Monsters were a lot of fun to fight.
2. Love the look of the main character and enemy artwork was done well.
3. Sound effects were timed well and fitting for the actions.
4. Each monster had their own unique attack and way to defeat them. I liked this.
5. Flying mini-boss was a fun battle.
FEEDBACK:
I don't want to look like I'm being overly critical or beating your game up. I think my feedback below could be quick fixes, but these were the parts of your game I found a bit frustrating...
1. The dialogue boxes continuously rising from the bottom of the screen was a bit tedious. Maybe have them rise up for the first box, but then all dialogue after just cycles through in the same spot with the press of a button from that point on.
2. Jumping pits, I feel, could be a bit more forgiving. You have to jump at the exact right moment to get over the thorn bushes and lava. I don't think it needs to be that precise. Maybe shorten the distance of the lava and thorn bushes a bit?
3. I defeated the flying mini-boss and died at the lava (see #2). Save points should always be before and after a boss/mini-boss. Once you defeat that mini-boss, you have to contend with lava, more enemies, the new firing rock enemy, and falling rocks... and then you reach a save. Anyone who dies during all of this has to repeat that mini-boss fight each time, which may get frustrating for a lot of players. Thankfully I only died at the lava once.
4. While I appreciate a good memory puzzle, most players won't know what those signs throughout the cave are for. I was even confused and going... "What is this?" It wasn't until I got all the way to that door I realized I should have remembered all three of those signs. I didn't, so I had to backtrack quite a bit, which was pretty tedious. Maybe hint to the player about remembering the signs, etc. Though... I feel puzzles, in games, should always be centered around a smaller area. Not an entire level with that much backtracking.
5. A roll or dodge would be nice. I always feel those look better than constantly jumping over enemies. Even a parry system would be nice. The knight battle felt a bit clunky. He was always on top of me, and I just kept jumping over him, landing on his head, etc.
OVERALL SCORE
Overall Fun: I did enjoy your game. Despite the 5 suggestions I gave above... combat was fun, animations were well done, and the mini-boss was a great time. The lack of save points after certain challenging sections, plus the memory puzzle that required me to backtrack, was a bit frustrating, though.
Art/Graphics: Very nicely done. Love the level design, character artwork, and enemies.
Controls/UI: I didn't have any issues with controls, attacks seemed to connect, and navigating the level was, for the most part, simple. The only part was #2 above... I never found an easy way to jump the lava... especially that first pit. I don't know how anyone can clear all those with the jump we have... unless I'm missing something there.
Sound/Music: Sound effects were well done, and the enemy deaths were creepy (especially when you killed a flying creature). The only part... the music got pretty repetitive, with it being the same track throughout the entire demo. That opening scene, outside the cave, maybe should be more ambient sounds or a slower/more ominous track... and then it picks up when you enter the cave, maybe. My personal opinion... exploring the levels and fighting smaller enemies should be softer music... and then it picks up to more intense tracks during mini-boss/boss fights. But overall... sound/music was good.