SPOILER: To get the money:
"Order" something rare from Bob, then steal the screwdriver from the toolbox while he's gone, then you screw open the thing in the park. Then, shock the circuit board with the tazer, which will give Steve an idea, then go talk to the oldy and use "plan C", then zap the circuit thing again when he goes over to drink. Then. go to the bank, and he'll be in the tree, and then you just have to talk to him.
SPOILER:
To get the wires: Pick up the gift, use it, wear the goggles, and ask the floating orb to "find item", then pick up the wires (if you think the hacking tool is in the way, you need to click further to the right. It will say "wires" when the mouse is positioned correctly)
To get the red cube: Go all the way to the left on the first screen.
You should look into making the shots a bit differently angled.
I gave up once I had 250k points (was going for the card anyhow), so I just sat in the middle waiting for my ship to be killed.
I got all the way to the boss with full health and partial adrenaline charge.
That makes the game boringly easy, as all you have to do, is wait until the boss, then use the medium shield, and then dodge the shots for the last 50% of the boss' health.
Waaay too slow progression, at least at level 1-3, which is all I bothered playing.
You NEED to give us credits for doing maps, whether or not we gain achievements.
Easy way of getting the levels done quickly: Gem Bombs. I don't know about the higher levels, but in the lower levels you can just spawn tons of basic gems and launch them at the enemy. I often have half the waves coming at once, and I only stop there because it takes too long to tell the waves to skip ahead.
The killzone bar in the knife fpart should be bigger.
It's fine to have it in there, but the difficulty is too much higher than the sniper difficulty, which means your game is simply frustrating, rather than being either a casual game, or a hardcore one.