So... you don't expect any comments, but you're just here for crits? Jesus almighty, go join a forum if you want crits, and then when you've finished your piece, come here!
Ahem, ok... your rain. ... I'm going to try and be nice here.
If i saw this without reading the title, i'd know it was raining in this animation, so score 1 for you there. However... seeing as you're 'experimenting' with it, it's pretty shoddy. Your rain doesn't actually move, flicking back and forth between dark grey and light grey lines just isn't going to cut it, go and look at rain, you'll find that it's pretty random, and falls a lot faster than... well, stationary grey lines. Go for speed, go crazy... go random. Rain isn't an art, it's just falling water, i don't think you've captured it very well at all.
The beginning of this is good, with the wavey floor, it definitely looks wet, but when your character steps in, it goes a bit wrong. Go and walk in a puddle, tell me how many ripples you see. I understand how tedious it will be to create a decent looking ripple and splash, but if it's what you're aiming for, you've gotta give it your all.