Interesting idea. On level 2, as I had no options, I immediately guessed I need to go to console, but you totally confused me with "don't use console" message. As I later learned from the bot suggestions, I actually have to use console.
Some levels (3, 5 maybe, I don't remember exactly and some later ones) I passed by randomly clicking a lot and didn't really understand what happens.
I made it to level 10, which I am not sure is reasonably possible: say it prints about once every 2 seconds and on average (assuming uniform distribution), you need to wait for 13 letters - that is 2*13=26 seconds per letter printed. That's already 5*26=130 (boring) seconds for the whole word out of 300 seconds available. But that's not accounting for bot removing letters (and bot will often unlock and remove in quick succession) and you making mistakes.
If you feel like trying some JavaScript coding game, you might check out mine. You are one of a few people qualified for it:)