Nice entry. For the first playable game? Awesome start!
There are couple things to keep in mind - first of, all UI is resolution sensitive in Unity. You can fix that by scalling it, not sure how exactly its done, but it is possible so it won't be tiny combat window on higher resolutions. You can see how much better it looked in JD Nation's video! Really nice when its all so close together and kind of cute too! Mine was even smaller window that your screenshots showed.
I wish there would be strafe button too! But movement felt good! So there is that :)
I guessed what scrap does in combat, but I had no idea what time ravager does and was confused at how to use it. So I lost to final boss, because I was tiny-human, I guess :D Some explanation can do wonders! Its a jam. so a lot to ask for sometimes. but you can write down hints in description on the page to help people who couldn't figure out things. Under spoiler maybe! I think you can do it even now, editing of the page is not against jam rules, but you can ask zooperdan just to be safer, of course, if you would want to do that.
Keep up good work! :)