Excellent job! This is quite impressive.
It's already been mentioned, but the physics are a bit fast. At first I actually enjoyed it (super fun!) ...but then I died too much and had to start the game over when I ran out of lives, and trying to be careful didn't feel as fun. I think the lives system fits well for a "throwback" ;D
Also, it was not obvious at first I had "3 health" and was indicated by transparency of the heart (I ♥️ using an actual heart for that ;D). I think either a meter or some other means would convey that better.