Congrats to release of your first cool game!
You have hit nice theme which is supported by neat graphic which unfortunately misses music and sound effects. It is big drawback for it. Next time you can try to download some creative common background music, just make sure you stated it somewhere clearly. Or you can use Bosca and Bfxr to create your own! To the game design, it is hard to navigate in the level. There is also a lot of small steps that you need to jump on. I would keep them because it makes the level less boring but I would let character to auto-climb it - no need to jump on it.
It is a good game and you are rightfully proud of yourself.