There are a lot of negative reviews about this game which I think is unfair. It's a misunderstood game, I wouldn't call it puzzle because that's misleading, but it is supposed to be a hacker simulator and nothing more than that.
My idea of a hacker simulator (before I decided to play any, that is) is something which can be periodically frustrating as you figure out (for yourself!) what to do next. It should require thinking skills, not just point and click with a hand-holding guide. A clear set of objectives and a list of commands so you know what to type and when, and when you finally do input the right code after trying time and time again, there should be a great sense of accomplishment and satisfaction.
Hacker Evolution does not let me down on my expectations of a hacker simulator, it is exactly what ti should be. It is unforgiving if you don't do things perfectly, but because the levels themselves would actually be quite SMALL if it weren't for all the try/fail/try/fail/try/succeed that goes into it, it is supposed to be difficult! So that you're not just breezing through it, because that would be completely unrealistic. I'm not saying that it is so amazing that it is like a hacker's version of say... Microsoft Flight Simulator where all the controls that would be in an actual aircraft are available to you. Because that would mean you would have to actually learn a programming language in order to play the game. It can't be 100% realistic because no one would play it, because the only people who could actually play it would be out hacking/ cracking real computers.
In saying that, it is an exciting game with a very simple, user friendly interface. The tutorial gives you enough information to learn the mere basics, it's not there to hold your hand and coddle you when you get frustrated and tell you that it loves you like in a lot of games. As far as I can see so far there's no ability to save your progress, you just have to start the level over from scratch, which isn't that big of a deal because you can generally remember what you need to do, and when you do things right in this game, it doesn't take very long to complete the levels.
Overall I'm very glad I didn't listen to a lot of these reviews which almost made me not buy the game (which is currently $2.99 on bundlestars for the ENTIRE Hackers Evolution games!). My actual point is, if you can't be bothered thinking for yourself, or feel you will have to resort to walkthroughs, then avoid this game like the plague because you won't find it very fun, because the AIM and the FUN of the game is to actually think for yourself!
8.5/10 - Gameplay; fun, simple to use once you get the jist of it. Helpful tutorial, but not too helpful so that it makes the game too easy.
7/10 - Music; the techno music is a bit of a stereotype, but it works well in the game and intensifies at just the right points which adds some nice suspense.
7/10 - Graphics; this game isn't about graphics, but they look fancier than what I imagine real hackers/ crackers work with.
Kind of like a CTU interface from 24.
7.5/10 - Overall rating.