Nice game mate!
I wasn't expecting the speed to gear up at around 110 beans or so, that caught me off guard! ; )
I think that there should be a 'Chain' or 'Streak' feature for collecting consecutive beans, which shows at the side of screen and resets once a single bean is missed, this could be used to clock up high score by attaching a multiplier to it. . .
25 streak = x 2
50 streak = x 3
100 streak = x5 (Because that is sodding hard!)
150 streak = x10 (And yes I have got a 150 streak...and I have video proof.. lol!)
Other idea would be a power up, fart boost or 5 seconds flying time.
And there should be a fart at the end of game, comparative to the amount of beans collected, that would be funny!
Oh and remember "Beanus Lives!"