An improvement.
This is definitely an improvement over episode two. The vampires are out of the picture, for one, and I don't have to collect things or look for passwords, for two.
I notice that you've attempted to improve the puzzle solving by actually having, you know, some puzzles, but they're extremely easy. When you turn on the pistons, all you need to do is a) be good at basic math, or b) if you aren't, just turn the first wheel all the way around once. If it doesn't turn on, change the multiplier and try again until it does. The password things are harder, but not in a good way. Since you have no way of knowing how much higher or lower the number you need is, you just have to guess. It's trial and error, which isn't fun.
Lastly, as far as I can tell, the dark matter being doesn't actually kill the player, so killing him seems a little uncalled for.
Decent, not the best point and click game here, but still worth a play through.