congratz on your first gamejam. It is really good concerning the athmosphere and the lightning.
Well, as other pointed out, it is really hard and unforgiving. If you dont remember where every enemy is you have no chance to make it. making them slower or hinting where there are could help.
And while the graphics are nice and the mood is good, i was still wondering why i really had performance issues on my Laptop, maybe think a bit about slower systems, and i guess it doesnt need to be 200 MB as well, there could be a lot of easy optimization potential. i noticed that large files are a big turnoff for little, 1 Minute game
keep going nevertheless :)