For a first entry, it's not bad. According to the controls on the page, I can't get any of the interesting mechanics to work. However, from what I'm gathering, it's your first entry to a jam, maybe even first, so keep it up! Attacking worked, the enemies worked, jumping and collision worked - it's a solid start to a fine jam-career :D
If you're exporting to WebGL, make sure to enable the optional Fullscreen button in Unity, this sometimes helps with these weird zoom-in bugs :D