Hey, for your first game ever this is not bad at all!
I really liked the story here, and the music selection and sound design as a whole is more than great.
Didn´t mind that much any of the issues you mentioned, and for the type of game this is I think the level design works fine. On a graphics way it could look better, but at least it doesn't distract from the characters and images used for the storytelling, which is the real important part.
Overall excellent job! If you do continue this game, please don't neglect the writing and storytelling, I think those are the game's strongest points :)