Rejic13, selling and then rebuying is the exact same thing. It's only going to be listed as a loss until you end up selling those again. You end up making the exact same amount of money as if the game had another buy button.
Try using Psy Beam and Spectral Psy Beams to beat Rott. I only had those 2 skills plus a third skill to damage him when his health is low. The rest of my skills were passive ones. I increased my health a psy damage as much as possible. I had something like 12k health and 1k psy damage when I beat him.
Engineers is really straightforward. You tag the end of the string with a green. Then remove the first one, splitting the screen into two symmetrical halves. For the red half, check the next first for R/B and the second for G/Y. If the second is not green, then rewrite the color of the first one and reenter the loop from the R/B & G/Y branch pair. If the second one is green, then only exit the loop if the first was blue. If the second is green and the first is red, delete the red and enter from the very beginning again. The blue half is symmetrical with the red half. The entire thing only took 3 R/B branches, 4 G/Y branches, 1 G writer, and 2 each of the R and B writers.
Storm serpent with beast mastery does 170%. Shouldn't it be 150%? Not that I'm complaining or anything, but either the description is wrong, or the effect is wrong.
The vac doesn't need to be activated twice to work. It gets deactivated whenever you turn on a different hack, so just make sure its the last hack you turn on.
You should not cap the skill levels at 6. Just make formulas for the skills and let people buy skills beyond level 30. I am level 44 now and it would be great if I could eventually kill everything in 1 hit.