Go into full screen, that’s because the game height is too small to see everything. Thank you for playing and you’re one of the few people that got that far!
Full sceen doesn't help. My screen resolution is 1366 x 768. I managed to beat your game to the last level, but I had to hack it by abusing built-in developer tools of Firefox. I think you could just make floating buttons/fields over the code of the game and solve the problem.
Hmm, I didnt consider someone liking it enough to beat the whole game, let alone ask for more levels. Making levels for this kind of game is hard, if I have any ideas I will add more levels! Thanks for playing.