Yes. Maybe a camera shake. I'll keep that in mind for the next jam. Thanks for Playing.
Just to let you know i played browser version and didn't have any lag problems, don't know if that's useful information or not :D
I'm no expert game maker of course (you can tell from my game XD) but a time saving way could be a splash of green particle effect from the player when healed and red when damaged, you can take this feedback as a grain of sand though :D