I can't help but agree with bluzi, this is probably impossibru. I like the idea of losing health when shrinking and gaining when growing, but there is almost no time for you to stay at max height because of the rng of platforms. Also, because you lose health whenever you shrink, doing it more than twice costs you more health than just rushing into the platform, which is counter intuitive.
Out of curiosity, have you ever managed to beat this game yourself? ;o One minute is kind of a long duration, especially when everything is trying to kill you
I really like the sounds and music tho. Character animation is also really good, because it's smooth (and I've always liked stick figures). With a little bit of tweaking this could be a really nice web game!