This is obviously improper. The valid strategy for this game unfolds as follows.

Step 1: Guess 11111.

Step 2: Replace all grey cells with 0s.

Thank you for your careful consideration.

And for a second, I was proud that I solved mine in 3 steps...

Step 1: Guess anything

Step 2: Flip all the non green cells.

I think it's actually possible to win on the second guess with any initial input. Or at least I did it a handful of times..

I got zero right: https://imgz.org/i6yJQnf4.png

Yea, you don’t need more than two chances.

I think I saw a two.

There is no such thing as a two, Bender!

I intended this strategy, but 00000 happened to be correct, so I didn't even need a step 2.

Came here to present my strategy for solving it in two tries, and realized it was far more complicated! (started with 00011)