Interesting concept but execution was poorly done.
All it needs is a good, comfy corner position and proper upgrades of drops (max number and power). Just ignore defense, it's worthless. Clicking will direct the drops against the light blobs NO MATTER THE DISTANCE, allowing for quick, clean elimination, with little to no cost in health (in fact, the core should only move around to gather drops, or to avoid a blob that spawns too close to itself).
Also, gets boring quickly than I imagined and starts lagging even faster. That's to expect due to moderately complex mechanics, but not so much.
I did enjoy the game, however.