Ok, also will you be working on lengthening the game, and if so how long do you want it to end up when you are finished?
I think there's two sides to that coin in the short term:
- Story Mode: Like the existing one, will be a finite set of levels, but with more of them.
- Endless Mode: Nobody shows up to save you, and difficulty steadily increases until you die. Randomization extends the replayability of this one, but it will also be fed new enemy types and abilities to play with on a regular basis.
So for next update I'm laying the groundwork to get Endless Mode in.
The response so far has been great! So I'll be working on this game for a long time to come. :)