First Public Demo

This is the first public demo I've ever released!

I still have tons of work to do on the game, but I figured it would be best to just get it out there.

More features to come:

- Bosses
- Lots more enemies, flying enemies, enemies that shoot/throw
- More weapons to unlock as you progress
- Explosives upgrades and weapons (Rocket Launcher)
- Drones as helpers.  Could be for combat, repair, collection.  Drones and their stats will be upgradable
- More structures.  Drilling platform to collect extra credits.  Maybe power generation.  Traps and defenses
- Conquer each planet in the solar system by reaching a certain wave.  Each planet will have buffs and/or debuffs that will apply to the game such as extra gravity, swampy, and magnetic.  Could affect things like move speed, structure cost/health, laser or weapon damage.