It was fun and enjoyable. The use of the limitation and theme is among the best I've seen yet, and it does it while remaining fun in general. The execution was, as is common in these kind of games, a bit lacking as the marker sometimes bugged and didn't let me mark enemies, but that's not catastrophic.
I didn't loose, and I didn't feel like taking too long was too fatalistic, so the stakes were low throughout. but that's not necessarily a bad thing. It's a good thing the game is so short, because with the content it has it would've gotten boring had it lasted more, as once you fall into the rhythm of marking the strongest enemies and then shocking them all at once there doesn't feel like there is anything else to do. Maybe it's that it's easy enough to allow sub optimal strategies and if it ramped up more I would've had to develop a better strategy, but it didn't feel like it.
Anyway, it was among the best I've played so far.