I will focus my comments on the vocal, since that seems to be the point of the exercise. Any chance of getting a real backing track? This one sounds a little....nintendo.
Its definitely heavy on the reverb. I like to think of reverb as giving a sense of space. If you think about what happens when you walk into space, you should get a better idea. You don't necessarily hear the reverb trails unless you are in a very very large reverberant space, but you can get a sense of how large the room is. Therefore, my rule of thumb is that if you can consciously hear the reverb, its too much. If its just adding a little space to the sound, then thats about right.
Also, are you familiar with comping a vocal? You have a good tone to your voice in places, but the track is pitchy, so I would suggest comping a couple takes together. If you aren't familiar with that technique, it has been covered here and elsewhere extensively.