I can totally see where you are coming from, why you would want it and that it should be added at some point. However it would mean touching basically all parts, starting with the editor, moving on towards the level file specs and then to the player itself. While nothing of this is particularly difficult, it still needs quite a bit of work. As such it is not high-priority for me at the moment.
My plan for the next future: Release a new NeoLemmix version in about two weeks. Until then I will mainly focus on bug-fixes, not additions to the game. After that I will have a bit of vacation, during which I want to do two things:
1) The less exciting one: Rearrange the skills and split the pickup skill spite for more flexibility.
2) The more exciting one: Get out a first trial version of the shimmier, so that it's physics can be tested by all of you.