Glad you like the ideas, i have an infinite number of them and they're all yours.
Ok, here's a twist, since you mentioned it can be elastic edges. Make one of the goodies the player collects as such to appear and bounce off the edges (a bit of physics) and at the same time influence them to move, and the player needs to increase his force field so that he captures that flying object and his force field doesnt touch the edges. You can experiment with the size of the perimiters and speed of force field inflation and make something out that really requires reflexes. Further, i think you could make a pretty big level where there isnt just "one screen" but the player moves around and the camera follows him in all 4 directions.
I think it can be made into a great logic/action game. For example collect a few crucial elements, and at the place where you collect them a "trace" appears. Now after you collect all of them, for example 3, you need to make all traces appear inside the same border. You do that by making bridges like youn mentioned, or pushing and inflating the edges while the blob itself is constantly trying to contract and become smaller. At that time you might also have an oponent thats doing the same thing against you, but you share only 1 of the "traces" so that 1 (or 2 if you want) is crucial to protect. You can make it hard enough with blob contraction alone, but AI is always fun so you might wanna see how it turns out. Along the way you can add many dynamic stuff, for example the "goodies" can fly around and bounce like you and i mentioned and once you capture them they leave the trace. Theres a gazillion variations. You can have a bunch of stuff as well, that uses energy if you use it. Stuff like you throw a field that slows a goodie down or the oponent down, or traps it for a moment, or create a wall or sphere which stays for a number of seconds that nothing can break thru and the blobs cannot contract over it, etc,etc,etc,etc...
It should be top down in my opinion, as well.
Uhhh ... there you go i hope it gives you ideas of your own and that you do something out of it. I got more as well, but noone likes to work on someone elses ideas, its always more motivating that you realise your own ideas and be creative! So be creative, and take your fun.
Ok, here's a twist, since you mentioned it can be elastic edges. Make one of the goodies the player collects as such to appear and bounce off the edges (a bit of physics) and at the same time influence them to move, and the player needs to increase his force field so that he captures that flying object and his force field doesnt touch the edges. You can experiment with the size of the perimiters and speed of force field inflation and make something out that really requires reflexes. Further, i think you could make a pretty big level where there isnt just "one screen" but the player moves around and the camera follows him in all 4 directions.
I think it can be made into a great logic/action game. For example collect a few crucial elements, and at the place where you collect them a "trace" appears. Now after you collect all of them, for example 3, you need to make all traces appear inside the same border. You do that by making bridges like youn mentioned, or pushing and inflating the edges while the blob itself is constantly trying to contract and become smaller. At that time you might also have an oponent thats doing the same thing against you, but you share only 1 of the "traces" so that 1 (or 2 if you want) is crucial to protect. You can make it hard enough with blob contraction alone, but AI is always fun so you might wanna see how it turns out. Along the way you can add many dynamic stuff, for example the "goodies" can fly around and bounce like you and i mentioned and once you capture them they leave the trace. Theres a gazillion variations. You can have a bunch of stuff as well, that uses energy if you use it. Stuff like you throw a field that slows a goodie down or the oponent down, or traps it for a moment, or create a wall or sphere which stays for a number of seconds that nothing can break thru and the blobs cannot contract over it, etc,etc,etc,etc...
It should be top down in my opinion, as well.
Uhhh ... there you go i hope it gives you ideas of your own and that you do something out of it. I got more as well, but noone likes to work on someone elses ideas, its always more motivating that you realise your own ideas and be creative! So be creative, and take your fun.