That's the spirit!! You'll get there 
So a thing I notice is that you're a bit inconsistent with lines - at the top they're fatter and darker, at the bottom (hands) they're really fine and scribbly. It kind of breaks the style in two.
Then for the big guy - I think his nose perspective is a bit off, I'd expect his nose to point more downwards since his face is turned down.
Lastly, I think you wanted to achieve an electrical look for the pink, but it looks a little more like liquid. You could make the pink lighter and add more glow I think.
Good luck on your journey!
