A online multiplier done solo? Nice!
I only have 2 suggestions: your parallax effect looks like is the other way around, it gives me headaches because the background moves faster than the front scenario (afaik it's supposed to be the other way around). Also your rain is so strong, fast, thick and bounces on the floor, it looks like bullets falling from the sky.
Anyways, minor and easy fixes, very good job in general!