The game has a simple premise, so I have to say I love that.
But it feels a bit annoying that nothing has animations and even more so, it feels annoying that everything looks like it was drawn in paint across the span of 10 minutes. I'd want better graphics for the falling guy and the birdie, at the very least.
It'd be nice to have the UI done with a more flashy engaging animation.
And it'd be nice to have a comical purpose as to why I found myself falling from the sky collecting balloons.
So refine it! Make it cool! The game isn't buggy or bad or anything right now, it just needs more aesthetic changes to make it look awesome! :>