Nice! You don't see word puzzle games like this too much. I think your take on it is really cool and fun. With a little more work this could be a really addicting mobile game.
As others have mentioned, the timer is a little harsh. I think the game might play better if it was one level, where the letters are replaced as you use them and the matrix grows with time. Finding an instance of CTRL could add extra time to the timer!
Additionally (and obviously this isn't something I'd expect in a jam haha) if you do update this, a dark theme would be really useful I think.