Bug 474715

I'm sorry I couldn't tell how to ask this question, or where to ask it. We have been playing kshisen for awhile now every evening. Once we got all of our hall of fame numbers in the 4 minute range (4:13-4:54), the game became much, much harder; we finish far fewer games and only very occasionally get into the 5 minute range. We tried configuring the game to "easy" but find no difference in the levels at all, a "hard" game is just as likely to be easier as an "easy" game is to be harder. I tried uninstalling and reinstalling from the software center, but all of our info and hall of fame numbers persisted, and the game difficulty stayed the same. Is there any way to reset the game short of a clean install of the OS, and reinstall of kshisen?
Or, barring that, is there any way to delete the folder where our history is stored, and how might we go about that?
Please help! We were really enjoying this game but not as much any more. 
Thank you!
Blue

SUMMARY
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STEPS TO REPRODUCE
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OBSERVED RESULT


EXPECTED RESULT


SOFTWARE/OS VERSIONS
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Linux/KDE Plasma: 
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ADDITIONAL INFORMATION