I like the game, fun concept and retro design.
You even pitched in the scenario part. So we won't just run around randomly blowing things up.
The only qualm I got with it, are those passages between zones.
I don't know..perhaps others love them this way..easily accessible and so on.
But I find it to be frustrating rather in bad way, when you are working through a tedious room, and have to hug walls to avoid swarm of dots, just to accidentally brush against portal and leave the place. Obviously re-setting whole work.
Over and over again.
Past that, rather nice experience.
Cheers