I love the new bioms!
I played on pc cause sadly it wouldnt start on my phone (firefox-browser). The movement feels good and I like that theres different options for controls. I first played with the mouse and then with the keyboard. Splitting seems to work a lot better now, I wasnt able to break it. It just sad that the splitting is required so rarely.
In the ice-biom theres some flickering in the background, I guess theres a gap between the sprites. And in the swamp-biom theres a gap on the left side and sometimes a gap in the background.
The skin-menu is really small and you have to scroll to see all the skins, even though there would be enough space on the screen to see them all. Also I think it would be helpful to see the amount of crystal shrooms you have while youre in the skin-menu.
Everytime I play and get to the ice-biom, I get the popup again with the explanation. I think it should only appear the first time you enter the new area. Also I think the icicles could fall a bit earlier. I always tried to make them fall without getting to close, so that I dont have to rush through. Like in mario, when you stand close to them but not directly under them, you make them fall and then get safely through. Or you run past them, before they fall.
Oh and maybe you could put the splitting on the right mouse-button so that you can play it just with the mouse ^^