Does the hectic aspect seem balanced? And if not, what aspects aren't? For example, enemies being too quick/slow, etc. Is the balance between using stardust for towers and using it to feed the blackhole sufficient?
I think it is balanced. At first I didn't know the objective by jumping straight to it. But then read you guys post on it that's when I got the idea that I should win by gathering the little things to the black hole and win.
Do you have any particular ideas for towers?
Jupiter should have a power to burn the slime-looking things.
What different terrain/level topography ideas do you think would be fun and interesting?
Climbing walls would be great for a short period of time.
Does the flow of the game feel moderately smooth, and in what ways if not?
It was smooth for a game test. But it's up to you guys if you guys want to put a timer between gather and purchasing saturn.
Is the UI intuitive and understandable? Any comments on adding/removing/clarifying anything to it?
The UI was understandable when I read the instructions.
There is currently no elemental effects/immunities implemented, so besides these, what kind of different behaviors might be interesting for enemies?
I actually don't know.
Did you find any interesting strategies during your gameplay? If so, please let us know what you found, and if not, tell us how we can give you more opportunity to strategize.
For the first three levels it is balanced but as more levels approaches it should at least have a timer, or make it so that the enemies are challenging afterwards with more towers.