I like the multilayer effect... are there games on the msx that have a multilayer effect too ?
Depends on whether you refer to MSX1 or MSX2 and higher...
A smooth and colourful multilayer scroll as shown above is totally impossible on MSX (any version, except perhaps using one of the more recent graphic cards).
I may be going 'outside of my book' now, but there's something coming up in the future which, with all due respect, will prove that statement wrong. 
Oohhh, I can't wait 
I could hardly imagine given the hard technical constraints, but please surprise me.
Well, what I (hopefully) can tell, is that it uses some clever screen 4 tile updating tricks.
At the moment it scrolls fast like hell (maybe even too fast) and it already got background animations, enemies, projectiles, huge sprites.
It's like a multidirectional Space Manbow / Fantasm Soldier II - scrolling platformer, but NO 'flapping' of borders on MSX2 and pixel-smooth.
I know I'm totally going out of my book now. 
But I can't help it.
One of the developers is going on vacation now, but in a few months there will probably be more info.
You could try to reproduce it on MSX2 using the hardware scroll and tile manipulation in screen 4, but you'll encounter a colour limitation for every 8*1 px area, meaning that the secondary (software) scroll will be less colourful.
Maybe you programmers could think of either misty or shadowy dark background. There are (non-msx) games which have totally black monochrome trees in the background behind closest multicolour trees. Thought those games don´t have parallax scroll, but I just gave this as an idea.
