I wasn't able to complete the game (I stopped on 2-2, perhaps halfway or so through when I ran out of Continues), I'll go more into detail below.
This is really impressive, and there's some things I'd be quite interested to learn how you accomplished. My only complaint is that some of the maps were really laggy for me (1-4, 2-1, and 2-2). I think all the maps that had multiple Sledges on it were the ones that were laggy for me.
That being said, there is a lot of creativity on display. I'm especially curious as to how you got the animations scrolling across the screen (in both the title screen and the game in general) and how you got the animated "Driftwood Gaming 2020 Game Jam" bar on the title screen. Honestly everything to do with the UI is impressive.
I like how you were given a hint as to how to defeat the first boss, but the player is still left to figure things out for themselves.
Going through the first floor gave me faint memories of playing through some of the dungeons in the Ys series - which has a handful of really cool dungeons.