Too hard!
Oh my god! This is hard. I have like a laptop keyboard that makes this difficult for me to even reach 90.
I recomend you to make different modes 'Very Easy' 'Easy', 'Medium', 'Hard', 'Expert' etc.
Or you could like make different types of clicking methodes. Like: 'Space',
'Mouse', 'Arrow keys (Left and Right)', 'Arrow Keys (Up and Down)'.
This is an cool, little, new and fun type of game.