Plot: No, you're not "The last survivor on earth." Apperently, the rest of the world is "just fine", and you've decided to single-handedly reclaim a zombie-infested city (either for the real estate, or giggles)
Tips: The pistol is useless. You want to spend your early-game cash between the Shotgun (For melee enemies) and Rifle (for the guys with guns). However, the rifle gets marginalized swiftly when you start fighting hordes of enemies, and you want to use the Missile Launcher. However, you want to make sure you level up the Assault Rifle when you can, because it's absolutely terrible until you're maxed level with it and have the Minigun, when it becomes the staple.
I agree with Quizer's comment on the need for an upgrade to increase jump and thrust height (Either increasing the height of your jumps, or allowing additional mid-air thrusts).
Also... what's with the "Reduces Vibration" upgrade? According to the tooltip, all it does is make Strange Gloop marginally easier to acquire, while making lava painfully slow to deplete to harvest/clear and making it almost impossible to acquire Abnormal Matter without dynamite
The unit control is WAY too frustrating... after the first area, it becomes a nightmare to control units.
Two tweaks would make control MUCH more intuitive:
1. Make the "Move"/"Attack move" button that pops up when you click empty space a toggle somewhere else than a confusing contextual pop-up.
2. Allow waypoints to chain, and make a toggle to change between Move to Waypoint and AttackMove to Waypoint.
Transmorpher
Decision 2
Glean
Necronator 2