The player controls are solid, and the character having some very nice 8 directional art is impressive for a 3 day jam.
There are a few issues I came across, the biggest being the log in system. You ask for an email and a password. the password is not hidden, so if a streamer plays this their password wont be hidden. Further, your email is displayed in the high score board for everyone to see instead of a username. Then to make it all a little worse, you don't need to use an email, this could just be a username as I saw other names on the scoreboard, not emails.
The enemies can walk through walls, and the projectiles they fire appear to be set as child objects and are being removed when you defeat the enemy.
I wish the doors had better graphics, it looks like they are still placeholder items. But I see the submission came in 1 minute before time, I imagine it is unfinished content and that is to be expected in a 3 day jam. A minor issue really.
Other than that this was actually a really smooth experience. Add some navigation to the enemies, let projectiles progress after death, set username and hide password, and then you've got a really great game.