I like the concept of this game, and there's some really satisfying visual feedback going on for your actions! I do agree with the commenter who said that (a) the difficulty level is very high, and (b) it's not a roguelike. For me personally, I think I would have enjoyed it more if you came away from each heist with a little cash to spend towards permanent upgrades; that might temper the difficulty a bit.
It took me way too long to figure out that you get penalized for the scanner intersecting either the circle around your mouse or a lingering circle around a node; intuitively I expected one or the other, not both. I kind of wished there were a half-second or so of grace period after the scanner detected you, too; it's frustrating when it just skims the edge of the circle around your cursor, and you end up getting penalized twice because it technically intersected the circle twice.
I didn't find I ever had time to look to the side and see how many actions I had remaining. For that to be useful to me, I think I would have needed something much easier to check in peripheral vision -- maybe a row of big dots which disappear one by one as you use your actions.
Finally, it was confusing to me that nodes would infect nearby nodes they didn't have a connection to. I wasn't expecting that, and it left me confused about the point of the connections.
Still, though, I think this is a really neat game, and the mechanic is a fun one I haven't seen before. I'd really like to see it polished into something a little less frustrating!