Sorry about that! I think it needs a save system too, but it was sadly outside the scope of a 6 week jam game.
If it helps there are key commands to skip levels. F2 to skip to next, but you will still need to pick up items.
RIP, that makes sense. Still a great game, though! Yeah, if you skip ahead then you'll probably have less items, so might as well replay it. I probably will soon. I'm not sure how the F2 thing works, though, since F2 is the decreasing volume button on the keyboard. Do you press Ctrl+F2 or something?