New Blocks Few Block Ideas

I'm new here, but I have a few block ideas for 2.0

1.Gravity Blocks
Here's a example:
A motor is horizontal, B steps on it. You move the motor vertically, B stays in place and doesn't fall.
This could make some levels confusing. The block has a small circle on all sides.
I based this block off monument valley, a game I really like with impossible things.

2.Slider Rail Intersections
Wanted to make a level only using sliders, metal blocks, draggale blocks and slider rails? But you dont want to put blocks as intersections because your too lazy? Slider rail intersections are here! I could bet one level would be a maze using the intersections.

3.Slabs
A block that is half a block. That's it.

4.Crumble Block
If you step on this for more than 5 seconds, the block will crumble and disappear. A timer will appear on top of the block counting when that block will crumble and disappear. It's like a stone or metal block but more beaten up.