Yes, as some pointed out, you can shake to wake them up. Yes, it is not discoverable enough :(
Beating without reviving the units is like a super hard version of the game, congrats! And sorry for the frustration... Hope you enjoyed your time anyway and thanks for the feedbacks!
I understand your pointer to the '5 minutes' thing. have read the rules several times, and I took the next section as the spirit of the jam instead of trying to limit the game itself to 5 minutes
Something small, polished, and pleasing to interact with, rather than a tiny broken piece of some larger game you'd like to make
But as the game materialized itself, I just chose to let it grow and pursue what it wanted to be with new ideas and enemies without being too restrictive. Was so into the project that I started to forget the jam and started listening to the fun haha. Might lose many points on the ratings, but I'm totally fine with that.
Again, thanks for playing and taking your time to beat the game a leave thoughtful feedbacks o/ (here and in the submission page)