Interesting concept, the mechanic definitely has potential. Although joining the blobs together again could be interesting in some way, I think having to balance the number of times you separate vs your health is what can probably lead to more interesting scenarios.
The UI was a bit confusing, wasn't sure if there was supposed to be a way of moving the original blob after separating or what, but this kind of stuff can be addressed once the pressure of the 48 hours is off :)