Cool idea, though I think putting healing on a keyboard button instead of onscreen so you didn't accidentally click it would be helpful. I really appreciate that you put the health with a background so it was easier to read. Also, FWIW you can update your submission data with your github repo. I see on the gamepage you have a link but I suspect more people, at least right now, will be seeing this page. Near the top right of your submission page will have a button to edit it.
Viewing post in Freezing Shooter jam comments
In this page, the submission page, you put "source" as "N/A, but i plan to open source it." but on your game page provide the GitHub link. I wanted you to know that you can actually edit your submission page to fill in that link. Especially during the jam rating period, I think more people see the submission page and forget to look at the actual game page. Obviously this isn't critical info but now you know just in case.