I'm running into an error where my water and power production out pace consumption and cause an overflow problem in the pipes and wires. The only way I've been able to correct the problem is deleting everything that has been contaminated and rebuilding. It's rather annoying. Other than that, I've been having fun.
As much as I would love to play this game, for whatever reason, I'm getting an unlit version. I can see outlines of shapes but none of the other details. Kind of a shame, because it looks like it would be fun.
The secret to the undead mode is to launch your payload while your previous shot is in motion and kill at least 1 target. After you release your payload, click again to reload and fire again. Because of the way it calculates the bonus, you can get ridiculously high points. If you miss or take too long, the bonus counter restarts. I was able to get the big boulder by day 6 without too much trouble.