This is very cute game and I like it because it's simple - you are falling and that's it. It fits the theme very well.
Gameplay wise it's fun and and challenging - the upgrades and the level variety are well appreciated. I like that you took your time creating more levels.
I didn't encounter many problems. The only things I saw are:
- The clouds on the sky level blend with the background and I didn't see them at fist ( If you can change their color);
- Second - some coins spawn inside objects and are impossible to get;
It was a fun and cute game.