Its ok. Developers dont have enough time to have a perfectly balanced game, which is why Easy/Hard modes, Skipping fights, and other components help a lot in games. Your game is difficult but that isn't a problem since I can skip the sections which were too difficult. In the choice between leaning too hard or too easy I recommend too easy, but being too easy is still a problem (I had a game that was so easy that people thought that the game was broken). It is also important to remember what you know about the game as a developer and what someone who doesn't know anything about your game will know.
Even though your game is difficult I liked the characters and the unique ways enemies attacked, and I can tell you put a lot of effort into this! :)