Wow, amazing game!
You really went and made a whole rpg game with lots of dialogue, a level up system, and items! The combat was really engaging with the real-time elements, and everything was excellently conveyed to the player. I really liked the Mega-man esque game structure where you could go to any stage in any order and could even challenge the end boss if you wanted to. I also really appreciate the ability to turn off random encounters!
The issue with the game I had is that it is quite easy to just dodge every attack and get crits every time, so it takes some of the difficulty out of it. I'd suggest making the timing for those things a tad tighter. Also, I wish the health was shown in numbers and not percentages, because it felt like I was just randomly targeting enemies at some points since i didn't know how much health they had.
Also you can just walk through the gate and go out of bounds in the boots level.
Overall, great game! Just replace the placeholder assets and make the UI a bit more attractive and you got a really cool game on your hands!