Really wanted to like this more, but a couple of things make it quite frustrating.
1) You shoot really slowly
2) Only three hearts (combined with slow shooting makes it a little too tough.) I suggest five hearts
3) THE FIRST BOSS: a) This is when it feels jumping should be a little higher/further b) Touching platforms (rather than jumping ON them) shouldn't trigger their timer
I did get to the second stage, but after dying there, it felt too frustrating to continue.
It is good though, and great for a first project. Just needs refining.
PUTIN ХУЙЛО