thx for downloading and checking it out! is it ok if u tell me your cell phone model and a screen shot? with android phones there are sooo many resolutions is hard to fit ever phone. Thats one thing I like ios better. About the difficulty i don't think i will make any changes, the highest score on ios leaderboard is 80 hoop right now. Everyday more and more people are getting 40+ hoops.
This is my second try to answer to your post =)
My phone resolution is 480 x 854 pixels. And yes, this is a real headache for android developers =)
About poor graphics, here is a screenshot:
P.S. It's bad that you don't handle 'back' button. All android devices have hardware back button and developers have to handle it.